Remove Oracle JDKs from tests

After recent license changes, we have decided to remove Oracle JDK
support from MMT entirely. This commit removes the last remnants of them
from testing.

.travis.yml

@@ -60,7 +60,7 @@ jobs:
       env:
         - "INFO='Check mmt.jar generation and integration tests'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk8
+      jdk: openjdk8
       language: scala
       scala: "2.12.3"
       script:
@@ -75,7 +75,7 @@ jobs:
       env:
         - "INFO='Check mmt.jar generation and integration tests'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk11
+      jdk: openjdk11
       language: scala
       scala: "2.12.3"
       script:
@@ -89,7 +89,7 @@ jobs:
       env:
         - "INFO='Check that unit tests run'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk8
+      jdk: openjdk8
       language: scala
       scala: "2.12.3"
       script:
@@ -98,7 +98,7 @@ jobs:
       env:
         - "INFO='Check that unit tests run'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk11
+      jdk: openjdk11
       language: scala
       scala: "2.12.3"
       script:
@@ -108,7 +108,7 @@ jobs:
       env:
         - "INFO='Check lfcatalog.jar generation using `sbt deployLFCatalog`'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk8
+      jdk: openjdk8
       language: scala
       scala: "2.12.3"
       script:
@@ -119,7 +119,7 @@ jobs:
       env:
         - "INFO='Check lfcatalog.jar generation using `sbt deployLFCatalog`'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk11
+      jdk: openjdk11
       language: scala
       scala: "2.12.3"
       script:
@@ -129,7 +129,7 @@ jobs:
       env:
         - "INFO='Check that apidoc generation works'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk8
+      jdk: openjdk8
       language: scala
       scala: "2.12.3"
       script:
@@ -139,7 +139,7 @@ jobs:
       env:
         - "INFO='Check that apidoc generation works'"
         - 'SBT_VERSION_CMD="^validate"'
-      jdk: oraclejdk11
+      jdk: openjdk11
       language: scala
       scala: "2.12.3"
       script:

src/project/src/main/scala/travis/Matrix/MatrixKey.scala

@@ -64,9 +64,9 @@ case object IBMJava8 extends MatrixKey[YAMLString]("jdk", "ibmjava8")
 case object OpenJDK6 extends MatrixKey[YAMLString]("jdk", "openjdk6")
 case object OpenJDK7 extends MatrixKey[YAMLString]("jdk", "openjdk7")
 case object OpenJDK8 extends MatrixKey[YAMLString]("jdk", "openjdk8")
-case object OpenJDK11 extends MatrixKey[YAMLString]("jdk", "oraclejdk11")
-case object OracleJDK8 extends MatrixKey[YAMLString]("jdk", "oraclejdk8")
-case object OracleJDK9 extends MatrixKey[YAMLString]("jdk", "oraclejdk9")
+case object OpenJDK11 extends MatrixKey[YAMLString]("jdk", "openjdk11")
+// case object OracleJDK8 extends MatrixKey[YAMLString]("jdk", "oraclejdk8")
+// case object OracleJDK9 extends MatrixKey[YAMLString]("jdk", "oraclejdk9")
 
 
 /** the versions of Scala being used */

src/travis.sbt

@@ -27,7 +27,7 @@ travisConfig := {
 
   val LinuxTesting = MatrixSet(
     Trusty, Language("scala"), Env(Map(("SBT_VERSION_CMD", "\"^validate\""))),
-    OracleJDK8, OpenJDK11
+    OpenJDK8, OpenJDK11
   )
 
   // in principle we would test OS X as follows