Update git submodules

* Update docs/submodules/releng from branch 'master'
  - potential fix for running prepare-functest playbook

    Change-Id: Id1ac133782e6b90929ddc055efbc6997ff63adc2
    Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e4d8bc6..98cbaa7 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e4d8bc6b5d8ebaf1a244d3617c94296c86f2258c
+Subproject commit 98cbaa71f0982fd31c1600067552a3da6d795483