Give examples for maintenance command
Use GLI's check for required arguments, switch flag order to make error messages clearer
add migration for creating entity ids for old entities
fix silly deadlock, make more resilient
fix specs
Merge branch 'master' into 711_sched_maint_invalid_entity
remove debugging output
move semaphore acquisition outside begin/ensure block
Merge pull request #717 from flapjack/711_sched_maint_invalid_entity

add migration for creating entity ids for old entities
fixes #721
Merge pull request #722 from flapjack/721_pagerduty_exception_get_acks

compact resulting array from EntityCheck#self.unacknowledged_failing, fixes #721
Merge branch 'maint/1.x' into 714_pagerduty_multiple_acks
reduce the risk of the bug in #714 manifesting