Print java version

Author: ejba

.travis.yml

@@ -13,6 +13,7 @@ install:
   - pip install .
 script:
   - mvn --version
+  - java --version
   - coverage erase
   - coverage run -m pytest --cov-report term tests integration
   - coverage report --fail-under 80

integration/resources/badexample/pom.xml

@@ -17,6 +17,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.source>11</maven.compiler.source>
     <maven.compiler.target>11</maven.compiler.target>
+    <maven.compiler.release>11</maven.compiler.release>
   </properties>
 
   <dependencies>