Fixed a missing catch of concurrent exception handling on gets
tossing correct exceptions to fix app inventor
Merge pull request #509 from nlake44/trans-fix

Trans fix
Merge pull request #511 from shatterednirvana/move-data-directory

moved cassandra to /opt so that we can mount ephemeral or persistent disks
Merge remote-tracking branch 'org/testing' into move-zookeeper-data-location