Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Fix tempest error on Apex

    1. Reconfigure v3_endpoint_type only when it is not None. It is
       adminURL by default.
    2. Ignore the setting of api_v2_admin, as it only applies if api_v2
       is set to True.

    Change-Id: I48b166bdb274467519390af3c1aa5ebf30b38c6d
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index cc26b57..b73ef5c 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit cc26b57d00b1d5dee299c9b47b25f8f472ac3eb8
+Subproject commit b73ef5c67c1fb56589627f273bfe28a194630c42