Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Config flavor metadata via functest - docs update"
  - Config flavor metadata via functest - docs update

    Related to the merged patch :
    "SNAPS via functest with flavor metadata configurable"

    Functest documents are updated accordingly.

    Change-Id: I874f041935f64b7240a5ec5de6e9c89b0f4a09fd
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 2845d29..ef77312 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 2845d29b185043da58c434c218e5b409b5d23ac4
+Subproject commit ef77312416c2060657f491b63dc87806a6f876dd