Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "prototypes: xci: Update SHAs for OSA and its roles"
  - prototypes: xci: Update SHAs for OSA and its roles

    This also updates the second (pre_release) argument of
    'update_ansible_role_requirements' from 'false' to 'true' so that
    non-openstack roles can be updated as well.

    Change-Id: Id424499f44c9b51c02d56e5d93580faeea50ad12
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index c25fa35..469ea32 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit c25fa35e198bb190312a1cf84569c3ebdd78b0a8
+Subproject commit 469ea32285a0a6ac86b8e2b5f5054695de09bdf1