Fix #362: prevent blocking main loop when starting run tasks

Drop complete() logic, waiting for run tasks to finish, from the
service_start() funciton to the general service_monitor().  This
refactor frees up the main loop and allows us to answer any API
calls from initctl even from the run task itself.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/lib/setup.sh

@@ -59,7 +59,7 @@ assert_restarts()
 
 assert_restart_cnt()
 {
-	assert "Finit restart cnt $1" "$(texec initctl status "$2" | awk '/Restarts/{print $4;}')" = "($1)"
+	assert "Finit restart total $1 cnt $2" "$(texec initctl status "$3" | awk '/Restarts/{print $3 $4;}')" = "$1($2)"
 }
 
 assert_norestart()