refactored crontabber to use transaction_executors
added some docs about the PG cronjob base classes
added transaction decorator to all methods database methods
more changes based on review
ensure rabbitmq is empty before doing any tests that touch it
added mixin decorators & convenience classes
reworked bugzilla crontab job to better organize transactions
notes
rewrote mixins.py - refactored all crontab apps
cleanup & fixed Nagios & LagLog
forgot this one