AMBARI-2167. Support for displaying various stacks and having the user select which stack to install. (yusaku)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/trunk@1485444 13f79535-47bb-0310-9956-ffa450edef68
AMBARI-2167. Support for displaying various stacks and having the user select which stack to install. (yusaku)

git-svn-id: https://svn.apache.org/repos/asf/incubator/ambari/trunk@1485445 13f79535-47bb-0310-9956-ffa450edef68