Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - xci: osa: Bump the SHA for the openstack_openrc role

    Previous bump missed the latest SHA for this role and yardstick
    started failing again due to the incomplete openrc file.

    Change-Id: I73f024250c73a42a6c2a36acaf8b1f8c6867dd2a
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 63de040..b8ad564 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 63de040d867ca8b8557d16affff7414b1f3931ba
+Subproject commit b8ad5643cb1b1d0f5b9da2247f284fed33acb5b3