Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Move OSM variables to os-nosdn-osm scenario"
  - Move OSM variables to os-nosdn-osm scenario

    This change removes OSM variables from releng-xci repo since they
    are declared in os-nosdn-osm scenario itself in releng-xci-scenarios
    repo.

    In order for this change to be verified, below change must be submitted.
        https://gerrit.opnfv.org/gerrit/#/c/61205/

    installer-type:osa
    deploy-scenario:os-nosdn-osm

    Change-Id: I9f3a1dbdfecfb2bb08cc215758bdc52aefcdf697
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>