AMBARI-2027. Add validation checks for Add Property on custom site configs. (yusaku)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/trunk@1476472 13f79535-47bb-0310-9956-ffa450edef68
AMBARI-2027. Add validation checks for Add Property on custom site configs. (yusaku)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/trunk@1476473 13f79535-47bb-0310-9956-ffa450edef68