Remove validation of state on state read property access
Remove validation of state on state read property access

This should be done (and are done, but not with the best
exception messages) in a more appropriate place (in the
methods of the jobboard that mutate a job via some manner,
aka, in consume, claim, abandon, trash...).

Part of fix for bug 1452388

Change-Id: If29bc73cc6e9282ad35a50ce0041efc3ff8f71d9

pombredanne/taskflow-1,openstack/taskflow,openstack/taskflow,junneyang/taskflow,jimbobhickville/taskflow,pombredanne/taskflow-1,junneyang/taskflow,jimbobhickville/taskflow