Fix test failures

Use correct parameter name for verify_master_failure and run MaxScale
explicitly as root in run_ctrl_c.sh.

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

@@ -10,7 +10,7 @@ servers=server1,server2,server3,server4
 user=maxskysql
 passwd=skysql
 monitor_interval=1000
-failover=true
+auto_failover=true
 
 [RW Split Router]
 type=service

maxscale-system-test/test_ctrl_c/test_ctrl_c.sh

@@ -10,7 +10,7 @@ fi
 
 T="$(date +%s)"
 
-$maxscale_access_sudo maxscale -d
+$maxscale_access_sudo maxscale -d -U root
 if [ $? -ne 0 ] ; then
 	exit 1
 fi