Switched to dockerfile/java:oracle-java-7 base
Removed mysql. Use self-contained image for this later
Removed zookeeper. Use self-contained image for this later
Updated maven version.  Not sure why. Why not?
Fixed possibly intentional typo in DB password
Fixed unnecessary string escaping
Removed mysql and zookeeper from supervisord.conf
Replicated fix for now-clearly-intentional typo in DB password
Added overlord service
Updated README