adding gatling script
Use Guava Cache for manager caches.
Add a short-term cache to avoid redundant Entity reloading in CpEntityManager & CpRelationManager.
Only init application index at most once per JVM.
Merge branch 'two-dot-o' into two-dot-o-events

Conflicts:
	stack/core/src/main/java/org/apache/usergrid/corepersistence/CpEntityManager.java