See also commit eb37f85.
- the Java versions 9, 10, 11 are supported
- on JDK 9 and onwards distro/jbossas7 is excluded except webapp and webapp-standalone modules
- maven enforcer plugin is updated to version 3.0.0-M1
- maven assembly plugin is updated to version 3.1.0
- jconsole dependency is excluded from wildfly-server
- by default wildfly 11 engine integration tests are executed
- test case SingleConsumerConditionTest#conditionStressTest fails randomly beginning with JDK 9 and onwards on CI as well as locally => Decided together with Daniel to remove it