JBDS-2703 fixing error for unknown future versions to be correctly identified

JBDS-2703 - adding javadoc and override tags where applicable

JBDS-2703 updating version constraint for plugin requiring new api
JBIDE-15310 - explicit detection for jpp6.1

uncommenting test suite classes (used during testing)

JBIDE-15310 forgot to update tests

Adding override tag
Adding decorator JBIDE-14728