fixing wrong variable definition
fixing wrong variable definition

Fixing dollar sign incorrect on the left hand side of a variable definition.

Change-Id: Ia3893fbfca0d8a51c9eccb57970bad8e5f3244e4
Closes-bug: #1476862

openstack/networking-ovs-dpdk,openstack/networking-ovs-dpdk,stackforge/networking-ovs-dpdk,stackforge/networking-ovs-dpdk,stackforge/networking-ovs-dpdk