Remove java 10 builds (java 10 no longer supported) and ignore failures with java11+ due to CPD

Signed-off-by: Taylor Smock <smocktaylor@gmail.com>

.gitlab-ci.yml

@@ -31,15 +31,6 @@ assemble:
     paths:
     - build/
 
-assemble with java 10:
-  stage: build
-  image: registry.gitlab.com/josm/docker-library/openjdk-10-josmplugin:latest
-  script:
-  - ./gradlew assemble --stacktrace
-  artifacts:
-    paths:
-    - build/
-
 assemble with java 11:
   stage: build
   image: registry.gitlab.com/josm/docker-library/openjdk-11-josmplugin:latest
@@ -69,7 +60,6 @@ assemble with java 13:
       - build/
   allow_failure: true
 
-
 ##############
 # Test stage #
 ##############
@@ -98,14 +88,6 @@ compile against latest JOSM:
   dependencies:
   - assemble
 
-build with java 10:
-  stage: test
-  image: registry.gitlab.com/josm/docker-library/openjdk-10-josmplugin:latest
-  script:
-  - ./gradlew build --stacktrace
-  dependencies:
-  - assemble with java 10
-
 build with java 11:
   stage: test
   image: registry.gitlab.com/josm/docker-library/openjdk-11-josmplugin:latest
@@ -113,6 +95,7 @@ build with java 11:
     - ./gradlew build --stacktrace
   dependencies:
     - assemble with java 11
+  allow_failure: true # due to copy-paste-detection
 
 build with java 12:
   stage: test
@@ -132,7 +115,7 @@ build with java 13:
     - assemble with java 13
   allow_failure: true
 
-java:
+junit tests:
   stage: test
   script:
   - ./gradlew test