Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[daisy] Skip signing kolla images"
  - [daisy] Skip signing kolla images

    No key avaliable at gs://opnfv-signing-keys/zte-virtual-subkey,
    so this PS skip signing key for kolla images.

    Change-Id: I1b934f01faeec0657a0019cd35ed209a511cdcdd
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 98e7bc2..da95fe6 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 98e7bc26d230e721a496d983f0439507c78d9bb8
+Subproject commit da95fe6416a07fde7619002395ed0ec5a956ce02