GBP: Multiple Ext-segs cannot be associated to a ExtPolicy

[puppet-py]

During Update/Create an ExtPolicy, multiple external-segments cannot be associated

[root@f2-controller ~(keystone_admin)]# gbp external-policy-update PublicExtPol --external-segment "Datacenter-Out PublicL3Out"
Bad Request (HTTP 400) (Request-ID: req-70567046-c68b-41fa-9526-1164e1a3b5b9)
[root@f2-controller ~(keystone_admin)]#

2015-10-12 12:42:38.242 4352 DEBUG neutron.api.v2.base [req-70567046-c68b-41fa-9526-1164e1a3b5b9 None] Request body: {u'external_policy': {u'external_segments': [u'PublicL3Out', u'0a85c571-3334-44f3-8d44-082056090cc8']}} prepare_request_body /usr/lib/python2.7/site-packages/neutron/api/v2/base.py:582
2015-10-12 12:42:38.242 4352 DEBUG neutron.api.v2.attributes [req-70567046-c68b-41fa-9526-1164e1a3b5b9 None] 'PublicL3Out' is not a valid UUID _validate_uuid /usr/lib/python2.7/site-packages/neutron/api/v2/attributes.py:417
2015-10-12 12:42:38.243 4352 DEBUG neutron.api.v2.attributes [req-70567046-c68b-41fa-9526-1164e1a3b5b9 None] 'PublicL3Out' is not a valid UUID _validate_uuid_list /usr/lib/python2.7/site-packages/neutron/api/v2/attributes.py:435
2015-10-12 12:42:38.243 4352 ERROR neutron.api.v2.resource [req-70567046-c68b-41fa-9526-1164e1a3b5b9 None] update failed
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource Traceback (most recent call last):
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/resource.py", line 87, in resource
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource result = method(request=request, **args)
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 501, in update
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource allow_bulk=self._allow_bulk)
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 642, in prepare_request_body
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource raise webob.exc.HTTPBadRequest(msg)
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource HTTPBadRequest: Invalid input for external_segments. Reason: 'PublicL3Out' is not a valid UUID.
2015-10-12 12:42:38.243 4352 TRACE neutron.api.v2.resource
2015-10-12 12:42:38.245 4352 INFO neutron.wsgi [req-70567046-c68b-41fa-9526-1164e1a3b5b9 None] 172.28.184.35 - - [12/Oct/2015 12:42:38] "PUT /v2.0/grouppolicy/external_policies/b6348a78-8c23-4878-9ae3-5f693018c282.json HTTP/1.1" 400 375 0.010234

[Sumit Naiksatam (snaiksat)]

Fixed by: https://review.openstack.org/#/c/233850/