Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Add the choice of interface for keystoneclient"
  - Add the choice of interface for keystoneclient

    1. When functest is running on external host not jumpserver,
       keystoneclient is used to retrieve or create projects/tenants
       and users, which would fail to establish connection to the admin
       endpoint.
    2. Keystoneclient will connect to the public endpoint by setting the
       env OS_INTERFACE to be public.
    3. Remove the admin endpoint check in check_os.sh.

    JIRA: FUNCTEST-801

    Change-Id: I324f5c8fdf61447319070a23f6b6bc6b1bbc1d48
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 392cae4..55d0b66 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 392cae434cce5dcf5a5e8dedc18b2791e3dd8e94
+Subproject commit 55d0b662f08ef3c648acfb8d3f1c6f6c71992187