Bug 1688: Fix IllegalStateEx from FlowCapableTopologyExporter

Modified code to enqueue the deletes on the OperationProcessor in
removeAffectedLinks.

Also added unit tests..

Change-Id: Ie7764303e6c18ff020567739e17e51aed76a8762
Signed-off-by: tpantelis <tpanteli@brocade.com>
Merge "Bug 1688: Fix IllegalStateEx from FlowCapableTopologyExporter"