Open Stack

Fix proposed to branch: master
Review: https://review.openstack.org/79270

** Changed in: neutron
       Status: New => In Progress

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https://bugs.launchpad.net/bugs/1289195

Title:
  The duplicate security group name cause don't know witch security
  group use in instance

Status in OpenStack Neutron (virtual network service):
  In Progress

Bug description:
  When create a security group, the duplicate name is allowed.
  In create a instance, which security group to use is designed by sg name, this may cause the user don't know witch sg is used and it may be not the user wanted. So the duplicate name of sg should be not allowed.

  In create instance, it's use set to filter the duplicate sg like:
  sg_names = list(set(sg_names))

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