Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 5141565bb09aedf33878648af08863b86e8dba27
  - Remove functest-components containers

    They can be safely removed as gambia is no longer supported.

    Change-Id: I71b4201203b601e40b308e6a414b874f450f96dc
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index adcb86b..5141565 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit adcb86b47d623600a06a0ec13615dd1d15ae9984
+Subproject commit 5141565bb09aedf33878648af08863b86e8dba27