Added the Nexus driver
Added the Nexus driver

SahilTikale/switchHaaS,meng-sun/hil,kylehogan/hil,kylehogan/hil,lokI8/haas,kylehogan/haas,meng-sun/hil,henn/hil_sahil,apoorvemohan/haas,apoorvemohan/haas,henn/hil,henn/hil,henn/hil_sahil,SahilTikale/haas,CCI-MOC/haas,henn/haas