Bug For Developers - LIST_SERVICES does not give proper output with supported service QR

Version -  Vertica Analytic Database v7.1.2-19

step 1 - Below shows usage of list services , It says QR is supported service

SELECT LIST_SERVICES('');
ERROR 0:  Usage:
Requires a Service Type to list services
Supported Service Types: 'TM', 'QR' , 'SYSTEM'
Example:
select list_services('TM');

step 2- When we use QR gives usage error, which is invalid

SELECT LIST_SERVICES('QR');
ERROR 0:  Usage:
Requires a Service Type to list services
Supported Service Types: 'TM', 'QR' , 'SYSTEM'
Example:
select list_services('TM');

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