Add check-nvp-config utility
Add check-nvp-config utility

Fixes bug 1130657

Change-Id: I514b92d53132d85144b5ed95450398bcfbf130f8

stackforge/networking-bigswitch,openstack/networking-bigswitch,wolverineav/networking-bigswitch,openstack/networking-bigswitch,stackforge/networking-bigswitch,wolverineav/networking-bigswitch