Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 53fbeacaa8ee42189bbe0cb111a10f291947b69b
  - Remove sudo in functest-kubernetes jjbs

    jenkins/slave doesn't provide sudo (alpine).

    Change-Id: I1b62d0d35b419e6446d613dd59197cd08bfbd795
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e0c8035..53fbeac 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e0c80352a73dce5c11c41cd6d1bb3f95946c1924
+Subproject commit 53fbeacaa8ee42189bbe0cb111a10f291947b69b