HBASE-10736 Fix Javadoc warnings introduced in HBASE-10169

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1577250 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10737 HConnectionImplementation should stop RpcClient on close

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1577304 13f79535-47bb-0310-9956-ffa450edef68