Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Bugfix: Permission denied when generate openrc file"
  - Bugfix: Permission denied when generate openrc file

    JIRA: DOVETAIL-438

    Error log:
    touch: cannot touch ‘/home/opnfv/cvp/pre_config/env_config.sh’: Permission denied
    fetch_os_creds.error: Cannot create the file specified. Check that the path
    is correct and run the script again.

    Change-Id: I46d1edacec58226bc6b5d6a88ab7b5b6cdea17f5
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 98e3208..2286202 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 98e320861631af57c903d7dc18aa9cbae6afa8a0
+Subproject commit 2286202a1502934bde5e8c0cf1d3c0aa6f542030