tree 7975d25e01e25aa6367b20af8603816c4ee60969
parent 96107397fe6c820304f850ca553dbc2693de84cc
author zhufl <zhu.fanglei@zte.com.cn> 1515048100 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1515551223 +0800

Use tenant_network if any in testcases after microversion v2.37

Now in testcases after microversion v2.37, if networks isn't passed
to create_test_server explicitly, no tenant_network will be retrieved
automatically, so they will always use networks='none'.

This is to use tenant_network if any be can found in testcases
after microversion v2.37 if networks='none' is not explicitly specified.
(if networks='none' is explictly specified, we should use it
prior to using tenant_network)

Change-Id: I0955e3507739e8e50384ba2cb2b56bd00b82750f