Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "playbooks: configure-opnfvhost: Ensure we copy only the tracked files"
  - playbooks: configure-opnfvhost: Ensure we copy only the tracked files

    This prevents rsync spending time copying temporary files which may have
    been created during a CI run.

    deploy-scenario:os-nosdn-nofeature
    installer-type:osa

    Change-Id: Ie02e0dbfc06b8fac40d6b90c4c99e361ecf1c0b2
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index afc3c2a..9bc4e51 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit afc3c2a4cb16b7fd29c1ceec6c4b7f566767dc6b
+Subproject commit 9bc4e51f59af4e6ab65e6e039a84e818fafb4aa0