HBASE-8327 Consolidate class loaders

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.94@1471469 13f79535-47bb-0310-9956-ffa450edef68
Merge branch '0.94' of https://github.com/apache/hbase into fb-YAHOO-316-0.94-gd
added *.iws to .gitignore