ktest: Fix SWITCH_TO_GOOD to also reboot the machine

When the option SWITCH_TO_GOOD is set, it will be called when the system
needs to reboot to the good server. But currently, this keeps the reboot
from happening. The SWITCH_TO_GOOD is just a way to get to a new kernel,
it may not mean to not reboot.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -1116,7 +1116,6 @@ sub reboot_to_good {
 
     if (defined($switch_to_good)) {
 	run_command $switch_to_good;
-	return;
     }
 
     reboot $time;