Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Fix invalid method names in vnfs

    Change-Id: Icff1a53ffd7b59d46543b79571b45872a9f243c3
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index f3b6c2e..50049c5 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit f3b6c2e235476e29eca1d744ba403fdeadc0f5fa
+Subproject commit 50049c516d0346a072c69a66f9f5ce173718bc92