Ignore .factorypath b/c it gets generated during maven compile.
Don't need to ignore every single target folder.
Instead use target/ pattern and add more common maven files.
Ignore .sonar folder for local sonar scanning.
* Upgrades test dependencies
* Drops unused lib
* Uses AssertJ instead of FestAssert
* Upgrades Surefire Maven Plugin to 2.22.1
* Downgrades to AssertJ 2.x to support JDK7
* decouple tests from java version
Refactor a java 9 conditional test to work always with any java version
See also WW-4845
* fix NullPointerException in NotURLClassLoader tests
Also includes a few improvements
See also WW-4845
* do not specify threadCount & forkMode which breaks tests in java 9
See also WW-4845
* pass all current tests with java 11
See also WW-4981
* fix an odd path problem in java 9
See also WW-4845
* gitignore test-output
See also WW-4981
* ask travis an oracle jdk 11 build
See also WW-4981
* ask travis to report coverage only in latest working jdk, jdk8
See also WW-4845