Increase verbosity and timeouts in bug662

The test restarts MaxScale while all backends are blocked. This will cause
MaxScale to wait until all connections to all servers time out which can
take a while.

Added a separate config for the test and lowered the timeouts. Also
inreased test timeouts.

maxscale-system-test/bug662.cpp

@@ -49,7 +49,8 @@ int main(int argc, char *argv[])
         fflush(stdout);
     }
 
-    Test->set_timeout(100);
+    Test->set_timeout(200);
+    Test->tprintf("Restarting MaxScale");
     Test->restart_maxscale();
 
     Test->set_timeout(20);