Replace the is_session and is_system distinction with variants
of is_privileged. This matches what libvirt uses internally, and
will help with supporting qemu:///embed at some point
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Rather than individual options for each possible hypervisor,
and annotations like 'remote' or 'session', just have it take a
fake URI to mock
Signed-off-by: Cole Robinson <crobinso@redhat.com>