Update git submodules
* Update docs/submodules/functest from branch 'stable/euphrates'
- Support to specify the valid external network name
In some deployments, the retrieved external network by the
def get_external_networks in Snaps checked by "router:external"
is not available. So it is necessary to specify the available
external network as an env by user.
Change-Id: I333e91dd106ed307541a9a197280199fde86bd30
Signed-off-by: Linda Wang <wangwulin@huawei.com>
(cherry picked from commit
aa7109d038a86f6a19a9fb4af96bd1199cd81330)