fence_virt/fence_xvm: Print status when invoked with -o status

Previously no status was printed to stdout when fence_virt and fence_xvm
were invoked with the -o status flag. The exit code of the program was
the only way to determine the result of the status operation. This
patch causes fence_virt and fence_xvm to additionally print
either "Status: ON" or "Status: OFF" when it is able to determine
the status.

Signed-off-by: Ryan McCabe <rmccabe@redhat.com>
fence_virtd: Fix broken systemd service file

Fix broken systemd service file caused by the inclusion of
network.target, which has been removed.

Signed-off-by: Ryan McCabe <rmccabe@redhat.com>