Delaying LPA Grid nodes shutdown

If work units are still running, LPA node shutdown can be delayed if required.

To shut down the LPA nodes, use the managegrid command:
managegrid stop -j <jvm-id> -g <grace-seconds> <LPA-binding-name>

If the Grid determines that no work units are running, the normal shutdown procedure will begin immediately. The normal shutdown procedure gives nodes up to 5 minutes to stop all background threads.

If the Grid determines that work units are running, it will wait up to <grace-seconds> seconds for the work units to complete. When there are no more work units running, or when <grace-seconds> seconds expires, the normal shutdown procedure will begin immediately.