Add tests which verify datastore methods on sensor service are called with the correct arguments.
Add tests which verify datastore methods on sensor service are called
with the correct arguments.

Plexxi/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2,nzlosh/st2,StackStorm/st2,Plexxi/st2,StackStorm/st2,StackStorm/st2,nzlosh/st2,nzlosh/st2,Plexxi/st2