Define main() in networking_nec.cmd.eventlet.nwa_agent
Define main() in networking_nec.cmd.eventlet.nwa_agent

It is required to allow nwa-agent to run through console_scripts

Change-Id: I29f0b46193a6ec9348ff120fd3ec9242d301dd33
Closes-Bug: #1550809

stackforge/networking-nec,openstack/networking-nec,stackforge/networking-nec,openstack/networking-nec