Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Remove extra tempest config item

    Dovetail has deleted some tempest test cases.
    So their config item can be removed.

    Change-Id: I331b8082c5a9ff40297a8e525564f222a77cb182
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f55686f..2c267fe 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f55686f5a9ebfe7763805cfdf9d7a05ad7132100
+Subproject commit 2c267febded0d55082a16cdd8707897984746c93