Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Sync thirdparty-requirements.txt

    It fixes the condition about the tempest version [1].

    [1] https://git.openstack.org/cgit/openstack/requirements/plain/global-requirements.txt?h=stable/ocata

    Change-Id: Iaa1f58aec1f58b372ff6280b1f1e4a5422986a55
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 1696e20..c68b71a 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 1696e20a069055b7afc7c0e3583dae5cf3ac9969
+Subproject commit c68b71a8024359bb4754fd561c5e3c2b43613f03