Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "change Dovetail CI jobs on Fuel"
  - change Dovetail CI jobs on Fuel

    1. run test suite default on Fuel on Tuesday for HA scenario
    2. run test suite proposed_tests on Fuel on Monday, Wednesday and Friday
       for HA scenario

    JIRA: DOVETAIL-613

    Change-Id: I67ef5d7dddfee01817b933ae3eeccf704924f9b0
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4a3d739..4626ca5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4a3d73952f8c5b4b4a308ebfa108a84f0c6b3c0e
+Subproject commit 4626ca5ff32ba4690319f01e3cfe2dc8a300f031