Update git submodules

* Update docs/submodules/releng from branch 'master'
  - [fuel] verify: Add baremetal testing on request

    Duplicate fuel-verify jobs based on cluster type (virtual, baremetal)
    and allow (re)checking changes using a specific scenario:
    - ALL changes will trigger a virtual POD CI cycle (build, deploy,
      smoke) on submit, rebase etc., just like they used to;
    - change comments containing a substring formatted like:
      * `recheck: os-odl-nofeature-ha`
      * `reverify: os-odl-nofeature-noha`
      * `recheck`
      will trigger only virtual or baremetal deployments of the required
      scenario (default os-nosdn-nofeature-noha) on:
      * virtual   PODs if scenario is NOHA;
      * baremetal PODs if scenario is HA;
    - limit arm64 verify job running on arm-virtual2 to the installation
      of infrastructure VMs and skip cluster setup to prevent POD time
      starvation;

    Limitations:
    - HA scenarios can only be verified on manual request via a change
      comment (e.g. 'recheck: os-odl-ovs-ha');

    JIRA: FUEL-390

    Change-Id: I6368cfd045180d6a7202b8d817b17a4b123ba2af
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index a519f21..8fc2ebc 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit a519f211bdd5f4f783edd55bbdcf6a846c818f17
+Subproject commit 8fc2ebc0c28e379fe3ca0cd7f13140103c908726