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>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index efd1e3c..f675cd5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit efd1e3cecd9d17f32f3e0097675eabd140cdafd4
+Subproject commit f675cd5e395e4d48d9ad895f5eb2f4a8b6098b13