Fix open_console method for VirtualMachine

cloudcontrol/node/hypervisor/domains/__init__.py

@@ -194,7 +194,9 @@ class VirtualMachine(object):
         if self.stream is not None:
             raise ConsoleAlreadyOpened('Console for this VM is already'
                                        ' opened')
-        if self.hypervisor.handler.tag_db['libvirtver'].value.startswith('8'):
+        if str(
+            self.hypervisor.handler.tag_db['__main__']['libvirtver'].value,
+        ).startswith('8'):
             raise ConsoleError(
                 'Cannot open console, not compatible with this version of libvirt')
         logger.info('Opening console stream on VM %s', self.name)