remove E112 hacking exemption and fix errors
remove E112 hacking exemption and fix errors

Change-Id: I6031ad2274c677b071a03068e5fb3c000fec7723
Partial-Bug: 1329017

fawadkhaliq/networking-plumgrid,msagheer/networking-plumgrid,openstack/networking-plumgrid,stackforge/networking-plumgrid,fawadkhaliq/networking-plumgrid,openstack/networking-plumgrid,msagheer/networking-plumgrid,stackforge/networking-plumgrid