Update git submodules

* Update docs/submodules/releng from branch 'master'
  - workspace wrapper put before scm

    after https://gerrit.opnfv.org/gerrit/#/c/35833/ merged

    still fails https://build.opnfv.org/ci/job/compass-verify-deploy-virtual-xenial-master/359/console

    Change-Id: Ia960d70fa6ffc24dcc4a135cccd08cc120f2348a
    Signed-off-by: MatthewLi <matthew.lijun@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c786cbc..26f4754 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c786cbc734a5248891355afb88b76af849aa9798
+Subproject commit 26f47542741f17b0d534565fc1cc6a6e6948dd35