Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - integrate k8-contiv-nofeature scenario in XCI

    Change-Id: I5f18e1060cb45246a15584fdd69c6c6bd3427001
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 8de89f3..a06ba78 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 8de89f399e18ea3b29f5f19b7319a11d45fedbe0
+Subproject commit a06ba78723d03b116b8408f01e3cd88811a81cc1