Force qemu logging to file
Force qemu logging to file

With the default setting, qemu uses virtlogd that is not yet
containerized and thus breaks containerized compute node. This patch
forces qemu to log to file.

Change-Id: I9a9705e5c79eec3bbaf02b491498886b858b7a95
Partial-Bug: #1652119

openstack/tripleo-common,openstack/tripleo-common