Fix mistral integration test on workflow cancellation
Fix mistral integration test on workflow cancellation

On cancel, the mistral querier no longer waits for tasks to complete due to the runaway action triggers bug.

StackStorm/st2,nzlosh/st2,peak6/st2,dennybaa/st2,armab/st2,nzlosh/st2,punalpatel/st2,emedvedev/st2,StackStorm/st2,emedvedev/st2,pixelrebel/st2,nzlosh/st2,pixelrebel/st2,tonybaloney/st2,nzlosh/st2,lakshmi-kannan/st2,emedvedev/st2,StackStorm/st2,peak6/st2,pixelrebel/st2,armab/st2,Plexxi/st2,tonybaloney/st2,lakshmi-kannan/st2,lakshmi-kannan/st2,Plexxi/st2,armab/st2,StackStorm/st2,Plexxi/st2,punalpatel/st2,punalpatel/st2,dennybaa/st2,tonybaloney/st2,Plexxi/st2,peak6/st2,dennybaa/st2