Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Fix all refstack-client requirements on-the-fly"
  - Fix all refstack-client requirements on-the-fly

    RefStack Client is out of OpenStack releases and its requirements must
    be modified before installing.

    Change-Id: Id1aed6cdc9c409d0036abe86591ff52e7ef0c26f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c6125c1..ec749b2 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c6125c1fae2806908b070802233fb1d98d34a97a
+Subproject commit ec749b2b2601cf31dadc4026d64299a1c705ec8d