Updated openstack/openstack
Project: openstack-dev/devstack  114dc2adbf15da44d2687b01545cb3f664afc0e8

XenAPI: Fix race condition waiting for VM to start

Buildroot on Ubuntu Trusty is slow to populate the vnc-port.
Wait for 20 seconds until the port is populated.

Change-Id: I50e5b5a161207d46e8ce0e304d816e8e5b68dbe8