Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Adjust and fix jobs and scripts

    This change
    - fixes GIT_BASE in jobs
    - adjusts build blockers
    - fixes where the flavor vars should be sourced from
    - sources flavor vars for bifrost periodic jobs
    - renames the xcimaster node to opnfv to be consistent
    - removes obsolete xci-provision.sh script
    - enable additional openstack services including tempest to
      ensure the deployment is sane

    Change-Id: Ifdce1da52d68a26c2b87e1bd3b1996ec119d8d90
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>