Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: scenarios: Fix location when copying scenarios to roles

    The location where we were putting the scenarios was wrong as it was
    placing them in xci/playbooks/roles/$scenario/$scenario so in the end
    the Ansible couldn't find the role we were looking for. As a result,
    the role was never executed. Moreover, we can use the synchronize
    module instead of the shell which should be both faster and safer.

    Change-Id: I3d996652bb6a62d23e259da5674d94596dad4d8d
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index b6907b8..ab9fb8b 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit b6907b858e215f358a16216a5095c9c6ed3520c4
+Subproject commit ab9fb8bed590af37cba92cf5b0517fd6fdc04674