Add ability to remove unplaced units
Clear ECS as well as db
fix failling test
Clean up object notation
Removing superfluous this.remove()
Update service and use env to remove

The service's aggregated unit status was not being updated, thus the databinding
not catching it.  Also, we now use the environment's remove_units method, as that
takes care of everything that was being done before without adding the new
method to the ECS.
Merge branch 'develop' into delete-unplaced
Add env back into serviceunit-token
Fix test around removing
Merge pull request #527 from makyo/delete-unplaced

Add ability to remove unplaced units