Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - jjb: xci: xci-run-functest: Escape the 'var' variable

    Commit 33073c5a3426c1867411db446bc9e5d84d2a7747 ("jjb: xci:
    xci-run-functest.sh: Ensure env vars are quoted during reload") added
    support for reloading the OPNFV host environment in a safe way but that
    didn't work because the internal '$var' variable was not escaped so it
    was evaluated on the local host instead of the remote one. This fixes
    the problem by properly escaping the variable.

    Change-Id: I7c90ae18f77aca076579f70c7c0e9a72aaaad7c8
    Signed-off-by: Markos Chandras <mchandras@suse.de>