[APIBAAS-1391]Adding cluster configuration for gatling cluster
Merge branch 'APIBAAS-1391' of github.com:r3b/usergrid-1 into USERGRID-252
Updated gatling cluster launcher to tag instances
Updated NodeRegistry to use only tags instead of external simple db

Upgraded AWS client

Removed unused registry list groovy script
Removed unused params in gatling cluster.  Moved signal of success to last step

Updated key selection to be a drop down of valid ssh keys
Fixes bug with gatling registration

Fixes bug with instance states and not running instances
Updated NodeRegistry to only select running instances in describe

Updated yourkit to the latest version
Updated registry to use public dns name
Merge remote-tracking branch 'origin/two-dot-o' into USERGRID-252
Added error message fix
Upgrades gatling version

Fixes jsonPath assertions to first check for entities[0]

Renamed create to be clearer when reading code
Refactored post users simulation and user scenarios
Fixes missing constructor in location
Updates PostUsers simulation to take into account only concurrent users.
Updated ES configuration to temporarily remove additional threads
Added build option for additional debug information to make profiling easier