Make qemu use nova user on all distros

This fix libvirtError Unable to open logfile issue.
Related-Bug: #1668654
Change-Id: I36720af0c7d3dd7c69d2404843f54c0991aea1bb

ansible/roles/nova/templates/qemu.conf.j2

 stdio_handler = "file"
 
-{% if kolla_base_distro in ['ubuntu', 'centos', 'oraclelinux']%}
-# TODO: this workaround need to be fixed in Pike
-# libvirt-bin latest version which runs vms as libvirt-qemu user.
-# This locks access to nova created files for vms which have
-# permissions 722 for nova user. We need to force qemu to use this user
-# to be able to access vm files.
-# see https://bugs.launchpad.net/kolla-ansible/+bug/1668654
-# see https://bugs.launchpad.net/kolla/+bug/1718541
 user = "nova"
 group = "nova"
-{% endif %}