Renamed DirectoryServer.getAttributeType() to DirectoryServer.getAttributeTypeOrNull().
CR-6874: fix OPENDJ-1797 Possible to add entries with invalid objectclass if structural objectclass checking is off
AutoRefactor: fix String usage
AutoRefactor: annotations cleanup
OPENDJ-1777 Move test source directory to src/test/java Move all test code from tests/unit-tests-testng/src/server directory to maven standard test source directory src/test/java Update pom.xml accordingly