Make sure we are passing arguments down for inventory and project update

actions. Fix up some unit tests.

awx/main/models/inventory.py

@@ -708,7 +708,7 @@ class InventorySource(PrimordialModel):
     def update(self, **kwargs):
         if self.can_update:
             inventory_update = self.inventory_updates.create()
-            inventory_update.signal_start()
+            inventory_update.signal_start(**kwargs)
             return inventory_update
 
     def get_absolute_url(self):
@@ -764,6 +764,11 @@ class InventoryUpdate(CommonTask):
         return 50
 
     def signal_start(self, **kwargs):
+        json_args = json.dumps(kwargs)
+        self.start_args = json_args
+        self.save()
+        self.start_args = encrypt_field(self, 'start_args')
+        self.save()
         signal_context = zmq.Context()
         signal_socket = signal_context.socket(zmq.REQ)
         signal_socket.connect(settings.TASK_COMMAND_PORT)