anchor.diff:  %%
   all() -> 
   	[client, get_all_clients, update_client_password, delete_client, subscriber, update_password,
  -	update_attributes, delete_subscriber].
  +	update_attributes, delete_subscriber, add_product].
   
   %%---------------------------------------------------------------------
   %%  Test cases
  
positive.code: 	ok = ocs:update_attributes(Username, Attribute2),
  	{ok, #subscriber{attributes = Attribute2}} = ocs:find_subscriber(Username).
  
  
  %%---------------------------------------------------------------------
  %%  Internal functions
  
negative.code: -include("ocs.hrl").
  -include_lib("common_test/include/ct.hrl").
  
  %% support deprecated_time_unit()
  -define(MILLISECOND, milli_seconds).
  %-define(MILLISECOND, millisecond).
  
  %%---------------------------------------------------------------------
  %%  Test server callback functions
  %%---------------------------------------------------------------------
  