handle exception for updating a bay which its stack has been deleted

[Peiyu Lin]

After i create a bay and delete its corresponding stack manually, i update the bay:
magnum bay-update k8sbay replace node_count=2

the error message in cmd is:Traceback (most recent call last):

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py"
, line 142, in _dispatch_and_reply
    executor_callback))

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py"
, line 186, in _dispatch
    executor_callback)

  File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py"
, line 129, in _do_dispatch
    result = func(ctxt, **new_args)

  File "/opt/stack/magnum/magnum/conductor/handlers/bay_conductor.py", line 160,|
 in bay_update
    raise exception.NotSupported(operation=operation)

NotSupported: Updating a bay when stack status is "DELETE_COMPLETE" is not suppo|
rted.
 (HTTP 400)

i think it should be handled more friendly.

[Martin Falatic (martinfalatic)]

Is this about the fact that this throws a long exception or because the error message isn't more explicitly stated ("Bay does not exist" or something)?

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/267367

[OpenStack Infra (hudson-openstack)]

Change abandoned by fengzhr (<email address hidden>) on branch: master
Review: https://review.openstack.org/267367

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/267612

[OpenStack Infra (hudson-openstack)]

Change abandoned by fengzhr (<email address hidden>) on branch: master
Review: https://review.openstack.org/267612