Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Update Functest jobs

    rally_full fails due to the SUT (functest-virtual).
    fds was not part of Gambia and shouldn't be ready yet.

    Change-Id: I372eb933e9aa78ddd962bd7477e83eb62f87ae97
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0c8ee50..3be3642 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0c8ee507c898de45f5b6ce1a6d2a4271272db73b
+Subproject commit 3be3642cbb71478feda07e2f2f29b9b3462ec2c6