Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Bugfix: fix the errors of onos_sfc"
  - Bugfix: fix the errors of onos_sfc

    1. Update the service type to "identity", "network", "compute" and
       "image", other than "keystone", "neutron", "nova" and "glance".

    JIRA: FUNCTEST-820

    Change-Id: I81b2311760fd717570561e6471525773378ad2f2
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index a32ee34..2d38d6d 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit a32ee348efa6d5858cef97294a94d85bce63d456
+Subproject commit 2d38d6ddfd88dd04fc3148984de6e633a545a456