Update git submodules

* Update docs/submodules/releng from branch 'master'
  to ef5f6b3ccbc1a94cc85c4667c97ffa6e687aacf3
  - Merge "Skip k8s_vims iruya gating"
  - Skip k8s_vims iruya gating

    SUT (kind v1.15) doesn't work enough [1]

    https://build.opnfv.org/ci/view/functest-kubernetes-pi/job/functest-kubernetes-pi-arm-iruya-daily/27/

    Change-Id: I9797badaf8ba89e0aca2a430bb4319f7cd708880
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 238011d..ef5f6b3 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 238011de57f34eabac467319a580cef65abc87e3
+Subproject commit ef5f6b3ccbc1a94cc85c4667c97ffa6e687aacf3