GoWorks fails to build on Netbeans 8.1 infrastructure

[TimKack]

GSF was updated with changelist 280039 in Netbeans, changing a lot of TestRunner infrastructure and hence breaking the build of go.project.
I have been trying to why org.netbeans.modules.gsf.testrunner.api.TestSession changed.
Here is an example of building on NB 8.1:

org.tvl.goworks.project.taskdefs:
org.tvl.goworks.project.common-init:
org.tvl.goworks.project.projectized-common.basic-init:
org.tvl.goworks.project.basic-init:
org.tvl.goworks.project.files-init:
org.tvl.goworks.project.nbm-license-init:
org.tvl.goworks.project.build-init:
warning: had to upgrade dependencies for module org.tvl.goworks.project: added = [module org.netbeans.api.progress.compat8 > 1.40, module org.netbeans.api.templates > 1.0, module org.netbeans.api.progress.nb > 1.40, module org.netbeans.modules.projectuiapi.base/1 > 1.78.0, module org.openide.util.ui > 9.3, module org.openide.filesystems.nb, module org.openide.filesystems.compat8, module org.netbeans.modules.parsing.indexing > 9.0] removed = []; details: [#243100: Separate desktop-independent utilities, Separate projectuiapi into desktop and NetBeans independent and dependent parts, Separation of Parsing and Indexing APIs, Separation of desktop and cleanup, Swing dependencies split away, Templates API has been separated into its own module.]
org.tvl.goworks.project.init:
org.tvl.goworks.project.up-to-date:
org.tvl.goworks.project.compile:
Compiling 22 source files to /Users/tkack/NetBeansProjects/goworks/go.project/build/classes
warning: [options] bootstrap class path not set in conjunction with -source 1.7
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/NonNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull': class file for javax.annotation.Nonnull not found
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/CheckForNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.netbeans.modules.openide.util.NbBundleProcessor' less than -source '1.7'
warning: Supported source version 'RELEASE_6' from annotation processor 'org.netbeans.modules.gsf.testrunner.CoreManagerProcessor' less than -source '1.7'
warning: No processor claimed any of these annotations: org.netbeans.api.annotations.common.CheckForNull,org.netbeans.api.annotations.common.NonNull
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/NonNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull': class file for javax.annotation.Nonnull not found
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/CheckForNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull'
warning: No processor claimed any of these annotations: javax.annotation.Generated
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/GoTestOutputWriter.java:20: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.Manager;
  symbol:   class Manager
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoCallstackFrameNode.java:11: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.CallstackFrameNode;
  symbol:   class CallstackFrameNode
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoCallstackFrameNode.java:17: error: cannot find symbol
public class GoCallstackFrameNode extends CallstackFrameNode {
  symbol: class CallstackFrameNode
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestMethodNode.java:12: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.TestMethodNode;
  symbol:   class TestMethodNode
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestMethodNode.java:19: error: cannot find symbol
public class GoTestMethodNode extends TestMethodNode {
  symbol: class TestMethodNode
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestRunnerNodeFactory.java:12: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.TestRunnerNodeFactory;
  symbol:   class TestRunnerNodeFactory
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestRunnerNodeFactory.java:14: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.TestsuiteNode;
  symbol:   class TestsuiteNode
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestRunnerNodeFactory.java:21: error: cannot find symbol
public class GoTestRunnerNodeFactory extends TestRunnerNodeFactory {
  symbol: class TestRunnerNodeFactory
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestRunnerNodeFactory.java:33: error: cannot find symbol
    public TestsuiteNode createTestSuiteNode(String suiteName, boolean filtered) {
  symbol:   class TestsuiteNode
  location: class GoTestRunnerNodeFactory
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestsuiteNode.java:11: error: cannot find symbol
import org.netbeans.modules.gsf.testrunner.api.TestsuiteNode;
  symbol:   class TestsuiteNode
  location: package org.netbeans.modules.gsf.testrunner.api
/Users/tkack/NetBeansProjects/goworks/go.project/src/org/tvl/goworks/project/testing/nodes/GoTestsuiteNode.java:17: error: cannot find symbol
public class GoTestsuiteNode extends TestsuiteNode {
  symbol: class TestsuiteNode
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/NonNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull': class file for javax.annotation.Nonnull not found
/Users/tkack/NetBeansProjects/goworks/build/public-package-jars/org-netbeans-api-annotations-common.jar(org/netbeans/api/annotations/common/CheckForNull.class): warning: Cannot find annotation method 'when()' in type 'Nonnull'
11 errors
10 warnings
/Applications/NetBeans/NetBeans 8.1.app/Contents/Resources/NetBeans/harness/suite.xml:187: The following error occurred while executing this line:
/Applications/NetBeans/NetBeans 8.1.app/Contents/Resources/NetBeans/harness/common.xml:224: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 59 seconds)