Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "disable the opera"
  - disable the opera

    it doesn't support the opera in compass4nfv master.
    it is needless to run daily and verify job.

    Change-Id: I9345f8c527c4b38e47b1d8de7d5c8cb2fdc1b30d
    Signed-off-by: wutianwei <wutianwei1@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index cf2b909..3440fda 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit cf2b909dd188bb3cbe247624be7de3ba40f084a2
+Subproject commit 3440fdad0d42cb6f77546d4618861b59f9a7cae6