erp5/util/testnode: hosting subscription url was not updated once it was set....

erp5/util/testnode: hosting subscription url was not updated once it was set. As a result, since testnode watched an old destroyed instance, the next test never started. Thus don't store hosting subscription url. It changes from time to time.

erp5/util/testnode/SlapOSMasterCommunicator.py

@@ -67,7 +67,6 @@ class SlapOSMasterCommunicator(object):
     self.slap_order = slap_order
     self.slap_supply = slap_supply
     self.hateoas_navigator = self.slap._hateoas_navigator
-    self.hosting_subscription_url = None
 
     if url is not None and \
       url.startswith(SOFTWARE_PRODUCT_NAMESPACE):
@@ -183,18 +182,19 @@ class SlapOSMasterCommunicator(object):
 
   @retryOnNetworkFailure
   def getInstanceUrlList(self):
-    if self.hosting_subscription_url is None:
     hosting_subscription_dict = self.hateoas_navigator._hateoas_getHostingSubscriptionDict()
+    # Don't store hosting subscription url. It changes from time to time.
+    hosting_subscription_url = None
     for hs in hosting_subscription_dict:
       if hs['title'] == self.name:
-          self.hosting_subscription_url = hs['href'] 
+        hosting_subscription_url = hs['href']
         break
 
-    if self.hosting_subscription_url is None:
+    if hosting_subscription_url is None:
       return None
 
     return self.hateoas_navigator.getHateoasInstanceList(
-            self.hosting_subscription_url)
+            hosting_subscription_url)
 
   @retryOnNetworkFailure
   def getNewsFromInstance(self, url):