Avoid ofp topology discovery

Avoid ofp topology discovery

openflowplugin is packaging lldp based topology discovery
along with "odl-openflowplugin-flow-services. This feature sends
periodic lldp messages on all the links available, to discover
the topology. Genius does not use this feature, but is coming
by default with the feature we were including.

This patch removes the feature which was previously used, and
use only the appropriate features needed for Genius functionality.

JIRA: OPNFLWPLUG-1024

Change-Id: Idbe860e66ade16f52a5a1860fe231ada26086af4
Signed-off-by: Faseela K <faseela.k@ericsson.com>