Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "set the openstack version for branch"
  - set the openstack version for branch

    set the openstack version newton for danube
    set the openstack version ocata for master
    danube branch use the compass.iso
    master branch use the compass.tar.gz
    separate the branch in the different pod

    Change-Id: Iec1e3206cac26bb2ad5379fa2600ede0451d997d
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a3bc239..66b066c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a3bc239313e67cab44d8bc64c32534ac9c1a0886
+Subproject commit 66b066c839641cfd7a4604af6f111d07dc50f595