Add information about locking down haas.cfg to the INSTALL.rst doc
Add information about locking down haas.cfg to the INSTALL.rst doc

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