Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Update (test-)requirements.txt"
  - Update (test-)requirements.txt

    It updates requirements.txt and test-requirements.txt according to
    OpenStack stable/ocata. It removes useless copyrights.

    Change-Id: I603b3030df231f210af47232f20aef85a08e20ba
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index fb3ef61..6049af7 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit fb3ef61a03cdf2fb938d771e9d23f6435cff240f
+Subproject commit 6049af70807987e124ba0cf4f05ee16fe89b88db