clients/tests: support Util.replace_text_sort_list() helper

This will be necessary to sort a list of text that contains text to
replace. The use case is to get all UUIDs from the server, but some
of these UUIDs are dynamic. So, in order to have a fixed sort order,
we need to handle sorting the list, based on the replacement.

clients/tests/test-client.py

@@ -309,6 +309,12 @@ class Util:
             bb = bb.decode('utf-8')
         return bb
 
+    @staticmethod
+    def replace_text_sort_list(lst, replace_arr):
+        lst = [ (Util.replace_text(elem, replace_arr), elem) for elem in lst ]
+        lst = sorted(lst)
+        lst = [ tup[1] for tup in lst ]
+        return list(lst)
 
     @staticmethod
     def debug_dbus_interface():