HBASE-10473 Add utility for adorning http Context

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1564927 13f79535-47bb-0310-9956-ffa450edef68
HBASE-10473 Add utility for adorning http Context

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1564928 13f79535-47bb-0310-9956-ffa450edef68