Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[daisy] Enable functest daily jobs on zte-pod9 for stable/fraser branch"
  - [daisy] Enable functest daily jobs on zte-pod9 for stable/fraser branch

    This PS is trying to solve errors like occured in [1].

    [1] https://build.opnfv.org/ci/job/daisy-os-nosdn-nofeature-ha-baremetal-daily-fraser/5/console

    Change-Id: Ie4e023794d54cf0e236e9094fabf8362e17d9c8a
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0705f31..773fa29 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 0705f31ab5bc54c073df120cbe0fe62cf10f9a81
+Subproject commit 773fa29f87385b0eebe7aaa31cd27fa1a74361a4