Add "test" configuration profile for tests

Looks like test.application.properties was needed after all. :-) I
replaced it with proper use of configuration profiles:

http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#boot-features-profiles

config/application-test.properties

@@ -0,0 +1,14 @@
+# This configuration file is loaded additionally to applications.properties
+# during unit and integration tests. The options defined in this file override
+# the ones in application.properties.
+
+# Set this to true to test with the PDC result database turned on.
+# Note that this requires a locally running MongoDB instance.
+ddb.storage.enable=false
+
+# Test database settings. If you have enabled the database, make sure that
+# these are different from your development and production settings.
+spring.data.mongodb.host=127.0.0.1
+spring.data.mongodb.port=27017
+spring.data.mongodb.database=pdc
+spring.data.mongodb.collection=pdc_results_test

src/test/java/de/ddb/pdc/PdcIntegrationTest.java

@@ -10,6 +10,7 @@
 import org.springframework.boot.test.SpringApplicationConfiguration;
 import org.springframework.boot.test.TestRestTemplate;
 import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.context.web.WebAppConfiguration;
 import org.springframework.test.web.client.MockRestServiceServer;
@@ -29,6 +30,7 @@
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringApplicationConfiguration(classes = Main.class)
 @WebAppConfiguration
+@ActiveProfiles({"test"})
 @IntegrationTest("server.port:0")
 public class PdcIntegrationTest {
 

src/test/java/de/ddb/pdc/storage/MongoStorageServiceTest.java

@@ -1,5 +1,6 @@
 package de.ddb.pdc.storage;
 
+import de.ddb.pdc.Main;
 import de.ddb.pdc.core.Answer;
 import de.ddb.pdc.core.AnsweredQuestion;
 import de.ddb.pdc.core.PDCResult;
@@ -11,13 +12,13 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.test.context.ContextConfiguration;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-import org.springframework.test.context.support.AnnotationConfigContextLoader;
 
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration(classes=TestConfiguration.class,
-    loader = AnnotationConfigContextLoader.class)
+@SpringApplicationConfiguration(classes = Main.class)
+@ActiveProfiles({"test"})
 public class MongoStorageServiceTest {
 
   @Autowired

src/test/java/de/ddb/pdc/web/PDCControllerTest.java

@@ -3,6 +3,7 @@
  */
 package de.ddb.pdc.web;
 
+import de.ddb.pdc.Main;
 import de.ddb.pdc.core.Answer;
 import de.ddb.pdc.core.PublicDomainCalculator;
 import de.ddb.pdc.core.AnsweredQuestion;
@@ -11,21 +12,21 @@
 import de.ddb.pdc.metadata.DDBItem;
 import de.ddb.pdc.metadata.MetaFetcher;
 import de.ddb.pdc.storage.StorageService;
-import de.ddb.pdc.storage.TestConfiguration;
 import java.util.ArrayList;
 import java.util.List;
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mockito;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.test.context.ActiveProfiles;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-import org.springframework.test.context.support.AnnotationConfigContextLoader;
 
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration(classes=TestConfiguration.class,
-    loader = AnnotationConfigContextLoader.class)
+@SpringApplicationConfiguration(classes = Main.class)
+@ActiveProfiles({"test"})
 public class PDCControllerTest {
 
   @Autowired