Long-running Hibernate calls should be cancelled when client stops pinging in Ice

[jmoore]

Once the ServiceFactoryI is destroyed (either via close() or via the router), the SecuritySystem should mark all Hibernate events as disabled so an exception will be thrown on long-running calls attached to that session.

There will need to be some differentation for when a user wishes to detached from the session specifically to allow the long-running calls to complete.

Re: #1017