Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: get-opnfv-scenario-requirements: Use checksum for rsync updates"
  - xci: get-opnfv-scenario-requirements: Use checksum for rsync updates
    
    Rsync will update modification times on transferred files so Ansible
    marks the task as 'changed' all the time even though the source and
    destination files are the same. This is confusing for XCI developers
    because they may think that there are local changes to the scenarios
    which is not always the case. As such, compare the 'checksums' of the
    actual files to determine if there are any changes that need to be
    copied over. This requires us to turn off the 'archive' option and
    use the individual options directly.
    
    This fixes the following problem where in a typical XCI job, all
    inbound scenarios appear to have changes which is not true.
    
    Mar 26 15:10:24 TASK [Synchronize local changes to scenarios' master branch] *******************
    Mar 26 15:10:24 ok: [localhost] => (item=os-odl-sfc)
    Mar 26 15:10:25 changed: [localhost] => (item=os-nosdn-nofeature)
    Mar 26 15:10:25 changed: [localhost] => (item=os-odl-nofeature)
    Mar 26 15:10:25 changed: [localhost] => (item=k8-nosdn-nofeature)
    Mar 26 15:10:26 ok: [localhost] => (item=os-odl-bgpvpn)
    
    Change-Id: I14f446c341a675b286e971f0b5c0be14d04abb9d
    Signed-off-by: Markos Chandras <mchandras@suse.de>
    

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