Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Force sync time

    For some reason, when the nodes are provisioned, they are out
    of sync time-wise. This prevents neutron agents on compute nodes
    from starting and then everything fails.

    This change restarts chrony after the network configuration is updated
    and the nodes have internet access and force synchs time on nodes.

    Change-Id: Ib27b1fa0313223b52fa2e6229d5a179581d62686
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2e9b055..86f7308 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2e9b055c5b693da5df42d52300c6bc6f508a4c1d
+Subproject commit 86f730857639949a2bb5135ae6366d00da424002