avocado.utils.virt: Disable virt if remote module is off

Signed-off-by: NRuda Moura <rmoura@redhat.com>

avocado/utils/virt.py

@@ -26,6 +26,9 @@ else:
 from xml.dom import minidom
 from avocado.utils import remote
 
+if remote.remote_capable is False:
+    virt_capable = False
+
 
 class Hypervisor(object):