rename send_notification to send_expiration

agent.py

@@ -284,9 +284,9 @@ class Context(object):
             return None
 
     @staticmethod
-    def send_notification(msg):
+    def send_expiration(url):
         import notify
-        notify.notify(msg)
+        notify.notify(url)
 
 
 class SerialLineReceiver(SerialLineReceiverBase):

vm_renewal

@@ -6,4 +6,5 @@ if __name__ == '__main__':
     try:
         notify.accept()
     except:
-        print "There was an unknown error while trying to renew this vm, please do it manually!"
\ No newline at end of file
+        print ("There was an unknown error while trying to "
+            "renew this vm, please do it manually!")