* Send GRAB_JOB after NO_OP.
* Send GRAB_JOB after initial setup to start the event-state system.
* Don't send GRAB_JOB after changing the functions. The gearman server will
maintain the existing state of the connection if functions change, so if
we are sleeping, we will still get appropriate NOOP messages even after
changing functions.
* Don't send GRAB_JOB when the task queue is empty. The event-state system
should send it when necessary.
* Send GRAB_JOB after job completion (to restart the event-state system).
Fixes 1183454.
Also fixes cases where we would end up grabbing multiple jobs in one cycle.
Change-Id: I36a890711ecdfef62a6554bac820acf0ca8b5f5b
0b017fe95d