Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Select $OPENSTACK_TAG instead of stable/ocata"
  - Select $OPENSTACK_TAG instead of stable/ocata

    It modifies functest and functest-core containers.

    Change-Id: I505baf460412e73d3bf4563b13edd849c2f02fac
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c34e1ef..2eeea59 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c34e1ef3c7f5cb047fcbdb8f7f3d6ed2b832aa0c
+Subproject commit 2eeea59953d477b1bb9cc3167426f547af2ba9f8