HBASE-10350. Master/AM/RegionStates changes to create and assign region replicas (ddas)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-10070@1569861 13f79535-47bb-0310-9956-ffa450edef68
Master/RS WebUI changes for region replicas

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-10070@1569992 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10361. Enable/AlterTable support for region replicas (ddas)

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/hbase-10070@1570008 13f79535-47bb-0310-9956-ffa450edef68