VOL-2823 Change vlan-filter task to support TT case

-Instead of hardcoded values, use the vid and pcp values in flow.
-Add task removal for flow-remove case.
-make incremental EVTO feature configurable 'accept_incremental_evto_update'
 parameter. This feature is disabled by default.

Change-Id: Id6178af89daa0b6897274db6067025d271fdd101
4 files changed