Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[dovetail] refactor the part of getting pod.yaml"
  - [dovetail] refactor the part of getting pod.yaml

    This patch should be merged after https://gerrit.opnfv.org/gerrit/#/c/63305/

    Change-Id: Ic809d8de200ba1b55e18c3079587404e4077cea0
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2646bc6..03e3787 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2646bc657d1615f7f7131e824fc4bf7a8e1692df
+Subproject commit 03e3787db719f5ccbc20ae3515deb5a1e6d64c22