Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "xci: osa: Fix OpenStack-Ansible bootstrap"
  - xci: osa: Fix OpenStack-Ansible bootstrap

    Commit 269b5fc033b1ee8d14d9d4694f4f0d3765866c0a ("xci: installer: osa:
    Fix status report when bootstrapping OSA") removed the 'chdir' parameter
    by accident and this broke the OpenStack-Ansible bootstrapping. This
    patch brings the missing parameter back.

    Change-Id: I0ecfa0eb4c91a9f1dfa2d86a8a50bacdbd224533
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 164e43f..a7731d3 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 164e43f7e8f3b2c7767445969414457fb58030fe
+Subproject commit a7731d320ffc368b67c48c7f4d3f0f318c735e19