Add cli wrappers for headnode_{start,stop}
Add cli wrappers for headnode_{start,stop}

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