Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Fix the way of getting endpoint port

    It will fail if the endpoint does not contain any port value when
    executing self.os_auth_url.rsplit("/")[2].rsplit(":")[1]

    JIRA: FUNCTEST-892

    Change-Id: Iba4103884b7c6e3b157bb95d775fac02c32ae728
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 45ad7723d0e40e7c5475584fc2a5bc0b5ad3ef56)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 3b80954..777acd3 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 3b80954f3caf36a957e7193db793ce318d51e58c
+Subproject commit 777acd341ff407838440dae3ed69291ec4c52626