Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "ericsson-pod1 slave defaults: Custom INSTALLER_IP"
  - ericsson-pod1 slave defaults: Custom INSTALLER_IP

    ericsson-pod1's jump host already has a static IP assigned to its
    pxebr, which collides with the mcpcontrol network default settings
    used by Fuel@OPNFV.
    Instead of changing the existing network configuration on the jump
    host to prevent CIDR collision, use a slightly different CIDR,
    which is derived from INSTALLER_IP.

    JIRA: FUEL-285

    Change-Id: Ibea10b3f6528f3b34bc4ab12c3f9131932f6dc84
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>