use configured services to find installed jobtrackers. also, could not find a beeswax warden service, so commented out for now.
removed oozie stuff from hue role
use state=present instead of state=latest to avoid upgrades if the play is run again in the future.
added mapr-httpfs and mapr-oozie roles
not using mysql role, as we'll assume that's handled elsewhere (e.g. for hivemeta, metrics, etc)