If the firewalld service is stopped, then VM will not start or migrate

Issue

• VM migration fails after stopping firewalld.
• VM will not power up
• On a RHV host the vdsm log will contain;

Thread-155500::ERROR::2016-10-28 09:05:18,555::migration::381::virt.vm::(run) vmId=`9b31408c-fcec-4490-9972-97b83e3b0982`::Failed to migrate
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/migration.py", line 363, in run
    self._startUnderlyingMigration(time.time())
  File "/usr/share/vdsm/virt/migration.py", line 436, in _startUnderlyingMigration
    self._perform_with_conv_schedule(duri, muri)
  File "/usr/share/vdsm/virt/migration.py", line 496, in _perform_with_conv_schedule
    self._perform_migration(duri, muri)
  File "/usr/share/vdsm/virt/migration.py", line 476, in _perform_migration
    self._vm._dom.migrateToURI3(duri, params, flags)
  File "/usr/lib/python2.7/site-packages/vdsm/virt/virdomain.py", line 69, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 123, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 917, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1836, in migrateToURI3
    if ret == -1: raise libvirtError ('virDomainMigrateToURI3() failed', dom=self)
libvirtError: The name org.fedoraproject.FirewallD1 was not provided by any .service files

• On RHEL KVM and RHV hosts, the journald messages will contain;

Oct 28 08:38:22 host-A systemd[1]: Stopped firewalld - dynamic firewall daemon.
Oct 28 08:47:52 host-A libvirtd[3133]: The name org.fedoraproject.FirewallD1 was not provided by any .service files

• Other libvirt-related functions may fail also.