Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 8245f7226a97bd650ecbe8a1330be8c182166589
  - Merge "Get XCI_FLAVOR as parameter from the commit msg"
  - Get XCI_FLAVOR as parameter from the commit msg

    When a new patch is pushed on releng-xci repo and the impact
    is not related to XCI_FLAVOR=mini, the environment preparation of CI
    should be done, choosing as XCI_FLAVOR noha or ha.

    This patch allows to get the XCI_FLAVOR parameter from commit message
    and specifically from xci-flavor parameter.

    Change-Id: Id5215e3fab1fc308435781204a6ed721a9c5a0c7
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>