Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: playbooks: Fix synchronization of external scenarios"
  - xci: playbooks: Fix synchronization of external scenarios

    The code was supposed to copy everything from
    {{ xci_path }}/{{ scenario.role }} to the XCI roles directory but
    external scenarios have their 'role' attribute relative to their
    repository whereas internal one have it relative to the {{ xci_path }}.
    As such, changes to external scenarios were not copied successfully
    to the playbooks directory and their changes where never tested.
    This removes the 'xci/scenarios/$scenario' part of the inbound
    roles attribute to make all them relative to the
    xci/scenarios/$scenario directory.

    Change-Id: Id28671b30c8ee4aa6bc186444c0e5a3a3ea3d89b
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 792dc36..b31d148 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 792dc36e891e427de0652d7941f6c347367e996e
+Subproject commit b31d148b5ae1216b2a209784ce11858caeddae4c