tests: test xml-rpc worker functions

This PR increases the test cases for XML-RPC worker functions.

This PR also fix #72 and #75.

kobo/hub/models.py

@@ -866,11 +866,11 @@ def timeout_task(self, recursive=True):
         try:
             self.__lock(self.worker_id, new_state=TASK_STATES["TIMEOUT"], initial_states=(TASK_STATES["OPEN"], ))
         except (MultipleObjectsReturned, ObjectDoesNotExist):
-            raise Exception("Cannot interrupt task %d, state is %s" % (self.id, self.get_state_display()))
+            raise Exception("Cannot timeout task %d, state is %s" % (self.id, self.get_state_display()))
 
         if recursive:
             for task in self.subtasks():
-                task.interrupt_task(recursive=True)
+                task.timeout_task(recursive=True)
         self.logs.gzip_logs()
 
     @transaction.atomic
@@ -993,6 +993,10 @@ def check_wait(self, child_task_list=None):
 
         return [finished, unfinished]
 
+    def set_weight(self, weight):
+        self.weight = weight
+        self.save()
+
 
 def _task_delete(sender, instance, **kwargs):
     """

kobo/hub/xmlrpc/worker.py

@@ -164,7 +164,7 @@ def fail_task(request, task_id, task_result):
 @validate_worker
 def set_task_weight(request, task_id, weight):
     task = Task.objects.get_and_verify(task_id=task_id, worker=request.worker)
-    task.setWeight(weight)
+    task.set_weight(weight)
     return task.weight