Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Update tempest.conf to enable tempest from external server"
  - Update tempest.conf to enable tempest from external server

    1. The endpoint type to use for OpenStack Identity API v3
       "v3_endpoint_type" is set to be "adminURL" by default, which should
       be updated to the env OS_ENDPOINT_TYPE with the value "publicURL"
    2. Reset the identity region name to "RegionOne"
    3. For keystone api v3 in Newton, 5 testcases aimming at identity admin
       v2 test should be omitted.

    JIRA: FUNCTEST-801

    Change-Id: I47ae41a80de0a52d32d25c9783860955f465099c
    Signed-off-by: Linda Wang <wangwulin@huawei.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 983ff4f..520ebc4 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 983ff4f3c63ed4088392d93e8ed6790fef8af9b7
+Subproject commit 520ebc4959d1a62d3792311c16c4276f53721486