Use already loaded Usergrid properties to populate Core Persistence configuration.
Fix creation of Cassandra and ElasticSearch host strings for case when more than one node.
Remove no longer used Priam stuff.
Multiple fixes to get stack working with Usergrid "two-dot-o" / Core Persistence, setting Tomcat RAM, Tomcat thread pool size and allowing use of c3.4xlarge nodes.
Add m3.large support.
Merge branch 'two-dot-o' of https://github.com/apache/incubator-usergrid into two-dot-o

Conflicts:
	stack/awscluster/assembly.xml
	stack/awscluster/src/main/dist/init_instance/init_db_server.sh
	stack/awscluster/src/main/dist/init_instance/init_rest_server.sh
	stack/awscluster/src/main/dist/init_instance/install_cassandra.sh
	stack/awscluster/src/main/dist/init_instance/install_elasticsearch.sh
	stack/awscluster/src/main/groovy/configure_elasticsearch.groovy
	stack/awscluster/src/main/groovy/configure_usergrid.groovy
	stack/awscluster/src/main/groovy/wait_for_instances.groovy
	stack/awscluster/ugcluster-cf.json