Improve TestVM and TestVMCollection capabilities

Added an is_network method to TestVM and get_blind
to TestVMCollection.

qubesadmin/tests/__init__.py

@@ -37,6 +37,9 @@ def __init__(self, name, **kwargs):
     def get_power_state(self):
         return getattr(self, 'power_state', 'Running')
 
+    def is_networked(self):
+        return bool(getattr(self, 'netvm', False))
+
     def __str__(self):
         return self.name
 
@@ -50,6 +53,8 @@ class TestVMCollection(dict):
     def __iter__(self):
         return iter(self.values())
 
+    get_blind = dict.get
+
 
 class TestProcess(object):
     def __init__(self, input_callback=None, stdout=None, stderr=None, stdout_data=None):