Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: Fix group for the OPFNV host"
  - xci: Fix group for the OPFNV host

    Ansible gets upset if we use the same name for a host and a group so
    add the OPNFV host to the deployment group. This fixes the following
    warning:

    [WARNING]: Found both group and host with same name: opnfv

    Change-Id: Idbaff712d40e8234721332aee6d10d5ba44c62ce
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 69de8e6..387731e 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 69de8e681a4510030aea1037f0c0dca17727205d
+Subproject commit 387731e0a0aa9b2a2580471a5e0c98ec821911d4