Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Add suffixes to OpenStack resource names

    All vnf testcases have to add suffixes in OpenStack resources names
    simply because the password is now generated before any run [1].

    Snaps mainly creates the resource only if unfound in all tenants [2].
    Then one remaining resource could easily raise permissions denied.
    It avoid conflicts between vrouter and cloudify_ims which are using the
    same names.

    [1] https://gerrit.opnfv.org/gerrit/#/c/50747/
    [2] https://jira.opnfv.org/browse/SNAPS-257

    Depends-On: If56cc44fe35ca06bc9033af620ddd3c0586877fe
    Change-Id: I1800886e575189b64fdc580a5ee6b59c81fcde5c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 91929a9..13e71a2 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 91929a9263638847491f1423eebfdcd528aa08cc
+Subproject commit 13e71a2fff4618eebbb37afeaef6b9560b8b00a6