Provide support for parallel test and test case execution

[mnovak1]

JUnit 5 allows to runs test and test cases in parallel. However XTF classes are not ready to be invoked from multiple threads and framework does not allow to use different namespaces for test cases to avoid conflicts.

Parallel test/test case execution becomes to be in urgent need to speed up long test suite runs.

[mnovak1]

As most of the tests are using Openshift class it should started there.

This will most likely split into several tasks as this touches some of the JUnit 5 extensions like:

• PodLogRecorder
• EventsRecorder
• and possibly other extensions as well