Begin processing the 1st record. Run 1, Event 1, LumiSection 1 on stream 0 at {Timestamp} 
%MSG-w cat_A:  UnitTestClient_X:sendSomeMessages {Timestamp}  Run: 1 Event: 1
LogWarning was used to send this message
%MSG
%MSG-w cat_B:  UnitTestClient_X:sendSomeMessages {Timestamp}  Run: 1 Event: 1
LogWarning was used to send this message
%MSG
