anchor.diff:  	P1 = #price{type = tariff, units = PackageUnits, size = PackageSize, amount = 0,
   			char_value_use = CharValueUse},
   	OfferId = add_offer([P1], "5"),
  -	Chars = [{"radiusReserveSessionTime", 60}],
  -	ProdRef = add_product(OfferId, Chars),
  +	ProdRef = add_product(OfferId, []),
   	Password = ocs:generate_password(),
   	ServiceId = DesPrefix ++ ocs:generate_identity(),
  -	{ok, _Service1} = ocs:add_service(ServiceId, Password, ProdRef, Chars),
  +	{ok, _Service1} = ocs:add_service(ServiceId, Password, ProdRef, []),
   	Timestamp = calendar:local_time(),
   	RemAmount = ocs_rest:millionths_in(1000),
   	B1 = bucket(cents, RemAmount),
  
positive.code: 	ProdRef = add_product(OfferId),
  	ServiceId = list_to_binary(ocs:generate_identity()),
  	Password = ocs:generate_password(),
  	Chars = [{"radiusReserveSessionTime", 60}],
  	{ok, _Service1} = ocs:add_service(ServiceId, Password,  ProdRef, Chars),
  	Timestamp = calendar:local_time(),
  	RemAmount = 20,
  	B1 = bucket(cents, RemAmount),
  
negative.code: 	ProdRef = add_product(OfferId),
  	ServiceId = list_to_binary(ocs:generate_identity()),
  	Password = ocs:generate_password(),
  	{ok, _Service1} = ocs:add_service(ServiceId, Password,  ProdRef, []),
  	StartingAmount = 1000,
  	B1 = bucket(cents, StartingAmount),
  	BId = add_bucket(ProdRef, B1),
  