Add unique config for kill_query

This way the info log is always on.

maxscale-system-test/cnf/maxscale.cnf.template.kill_query

@@ -0,0 +1,28 @@
+[maxscale]
+threads=###threads###
+log_info=1
+
+###server###
+
+[MySQL-Monitor]
+type=monitor
+module=mysqlmon
+servers=###server_line###
+user=maxskysql
+password=skysql
+monitor_interval=1000
+
+[RW-Split-Router]
+type=service
+router=readwritesplit
+servers=###server_line###
+user=maxskysql
+password=skysql
+
+[Read-Connection-Router-Slave]
+type=service
+router=readconnroute
+router_options=slave
+servers=###server_line###
+user=maxskysql
+password=skysql