Cisco plugin cleanup
Cisco plugin cleanup

Removing unused plugins and code from the Cisco plugin framework.

Change-Id: Ib22d173a088ad50b410a51a1d92685259d0af473
Implements: blueprint cisco-plugin-cleanup

yamt/networking-ofagent,yamt/networking-ofagent-old3,budnyjj/ofagent,budnyjj/ofagent