Updated openstack/openstack
Project: openstack/python-novaclient  c40891b2824805458db40067ab669d961ecfdfed
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Nova CLI for server groups

CLI support for blueprint instance-group-api-extension

REST API support:- https://review.openstack.org/#/c/62557/

DocImpact
 - supports create, list, get and delete
 - only V2 is supported

Change-Id: Iaa5a2922b9a0eed9f682b7584c2acf582379b422