tree 1c76f99b2e9eaa0d785b7c02457687d1cf9fe543
parent c7b487aba76ea83b267a4b864dd053fd8d920f86
author zhufl <zhu.fanglei@zte.com.cn> 1484728714 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1487142504 +0800

Add skip if public_network_id is not specified

If public_network_id is not specified in tempest.conf,
the testcases using it should be skipped, otherwize we will
get errors like:
    BadRequest: Bad request
    Details: {u'message': u"Invalid input for external_gateway_info.
              Reason: '' is not a valid UUID.",
              u'type': u'HTTPBadRequest', u'detail': u''}

Besides, _create_router in dynamic_creds will try to create_router
using self.public_network_id as external_gateway_info, which will also
raise Error when self.public_network_id is None, so here is to pass
external_gateway_info to create_router only when self.public_network_id
is not None.

Change-Id: I567f9a51d301bcfea782d549298dbd3a598f3b85