Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Fix the regular expression for refstack

    Otherwise, this line could not be matched:
    {0} tempest.api.identity.v3.test_tokens.TokensV3Test.test_create_token [0.143237s] ... ok
    -> the matched result: tempest.api.identity.v3.test_t

    Change-Id: I97282a9c98a889a015a40f9ad2d700906bb88fb1
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit 843de6db7838dc20fa4a1f44731ea47cbcffa250)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 732b273..f962e5d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 732b27391b5dcff3a317b6f9cc3d5be3659a15b2
+Subproject commit f962e5dd6a92f371c9a829972041f9afb1cb5314