Remove current_test from log formatter and instead concatenate it to messages manually
Remove current_test from log formatter and instead concatenate it to messages manually

patch by Joel Knighton; reviewed by Stefan Podkowinski for CASSANDRA-14059

pcmanus/cassandra-dtest,snazy/cassandra-dtest,iamaleksey/cassandra-dtest,bdeggleston/cassandra-dtest,aweisberg/cassandra-dtest,beobal/cassandra-dtest,pauloricardomg/cassandra-dtest,stef1927/cassandra-dtest,pauloricardomg/cassandra-dtest,snazy/cassandra-dtest,stef1927/cassandra-dtest,iamaleksey/cassandra-dtest,bdeggleston/cassandra-dtest,aweisberg/cassandra-dtest,blerer/cassandra-dtest,beobal/cassandra-dtest,blerer/cassandra-dtest