bitbake: toaster: Update API used to make runbuilds methods run in transactions

runbuilds previously had its methods decorated with
transaction.commit_on_success, which is now deprecated. transaction.atomic
is an (almost) drop-in replacement for this, so use this instead.

[YOCTO #8364]

(Bitbake rev: c4804b84eaaef6a81027bae5cf8bfe63d949c293)

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: brian avery <avery.brian@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/bldcontrol/management/commands/runbuilds.py

@@ -14,14 +14,14 @@ class Command(NoArgsCommand):
     help    = "Schedules and executes build requests as possible. Does not return (interrupt with Ctrl-C)"
 
 
-    @transaction.commit_on_success
+    @transaction.atomic
     def _selectBuildEnvironment(self):
         bec = getBuildEnvironmentController(lock = BuildEnvironment.LOCK_FREE)
         bec.be.lock = BuildEnvironment.LOCK_LOCK
         bec.be.save()
         return bec
 
-    @transaction.commit_on_success
+    @transaction.atomic
     def _selectBuildRequest(self):
         br = BuildRequest.objects.filter(state = BuildRequest.REQ_QUEUED).order_by('pk')[0]
         br.state = BuildRequest.REQ_INPROGRESS