AMBARI-3746. Some clean up for previous commits. (xiwang)
AMBARI-3745. Provide dialog to create new config-group by overriding property. (srimanth)
Revert "AMBARI-3746. Some clean up for previous commits. (xiwang)"

This reverts commit 5fe89e76bac17cf6d53fa51d2ea106cfa9fbb54b.