GroupProperty Tests.
change entity Path
Fixed GroupProperty to pass previously failing tests.
Added missing license headers to new files.
Added fixes for group property test.
group testing fix
Merge branch 'failing_tests' of github.com:/structr/structr into failing_tests

Conflicts:
	structr-rest/src/test/java/org/structr/rest/test/GroupPropertyTest.java
Merge branch 'failing_tests' into develop