Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Stop rolling snaps (bypass bugfixes)

    Snaps now requires admin role for creating routers [1].

    [1] https://git.opnfv.org/snaps/commit/?h=stable/fraser&id=b351d8cf4d882c7ec3acbd0111b4d0bf1747c9d3

    Change-Id: If3148ffac3e572f7971dbd56dad889e0028a763a
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/functest b/docs/submodules/functest
index 6e12f95..5c6b1b4 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit 6e12f95b7dd0f5b22ca00d6823d75483e368f75d
+Subproject commit 5c6b1b4710f2a69f11a1ccb1c699f7c8c3616290