Credentials are cleared on server crash or network disconnect causing automatic reconnect to secure destinations to fail.

Steps to reproduce:
1. Run an application containing a Consumer, configured for a high number of resubscribeAttempts, that will subscribe to a messaging destination protected with a security constraint.
2. Invoke setCredentials() on the Consumer and subscribe.
3. Bounce the server.

Actual Results: Client will automatically reconnect once the server has restarted but its automatic resubscribe will fail.

Expected Results: Client should seemlessly reconnect following a disconnect outside of its control.

Workaround (if any): Disable reconnect/refill and on disconnect manually reassign credentials and resubscribe or reissue fills.