HBASE-8654 src assembly does not include hbase-hadoop2-compat module

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1487713 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-317-trunk-gd