Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Filter installers for cloudify_vrouter

    As cloudify_vrouter doesn't support SSL endpoints [1], it shouldn't
    be executed if compass or fuel.

    [1] https://jira.opnfv.org/browse/FUNCTEST-881

    Change-Id: Ieedc0d5eca57f00da2121c9e07dd5cc57f978ef6
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit b5c7a96a1eb523e1c89f3ea9d143ddf39c518022)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index c0aa53c..a6ef634 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit c0aa53c61fdee02bc880a962b9a3de34411ec8eb
+Subproject commit a6ef634a1bc7ba1f877f421bfcb7532d9501c045