server group should take policies as a MUST option

[Guangya Liu (Jay Lau)]

When create a server group,

liugya@liugya-ubuntu:~$ nova help server-group-create
usage: nova server-group-create [--policy <policy>] <name>

Create a new server group with the specified details.

Positional arguments:
  <name> Server group name.

Optional arguments:
  --policy <policy> Policies for the server groups <<<<<< It is optional

liugya@liugya-ubuntu:~$ nova server-group-create rg1 << Create failed
ERROR (BadRequest): Invalid input received: 'policies' is either missing or empty. (HTTP 400) (Request-ID: req-00982b47-7fe2-44db-b5cd-5600b5ed73ce)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/98480

[Verónica Musso (veronica-a-musso)]

This bug is set as Invalid because it is duplicated.
This is the other bug https://bugs.launchpad.net/python-novaclient/+bug/1323909 and its proposed solution https://review.openstack.org/#/c/96382/

[OpenStack Infra (hudson-openstack)]

Change abandoned by Verónica Musso (<email address hidden>) on branch: master
Review: https://review.openstack.org/98480
Reason: I am abandoning this patch because the bug is duplicated and there is another patch in progress.
This is the other bug https://bugs.launchpad.net/python-novaclient/+bug/1323909 and its proposed solution https://review.openstack.org/#/c/96382/