Updated openstack/openstack
Project: openstack/heat  8249ed170fb30c779e66d90be6e0c0cd8bb162d6

Refactor service readiness notification

Build upon cceda95a35f18f5f7b52daaf0662a4cd3768b3ac apply Oslo systemd
module. It was imported in aef33d2d716c064f1f571c334fd36b1ea5928d5c. It
also drops heat.common.systemd and deprecates onready configuration
parameter.

Oslo commit 53e1214c092f09e3851b1a1b55289a93a72b09ec

Change-Id: I80f325c9be9c171c2dc8d5526570bf64f0f87c78