Fix for CDIValidatorTest.
Sleep method added for CDI Validator to have enough time to validate
observers
Mapping diagram invocation fixed in ui test
JBIDE-13709 Comment out esb test in category.xml

Esb test requires zest that is not included in the TP.
It is included in JBTIS TP, but we don't need soa tests in master
so I'm choosing this approach right now.
Change target java facet on cdi test project
Set compiler level version on 1.6 so there will be no problem when using
Java 1.6 nor 1.7.
Create two scenarios for external changes testing