Allow personality to be emptied by supplying an empty list
Allow personality to be emptied by supplying an empty list

opsdisk/pyrax,sivel/pyrax,EdLeafe/pyrax,rackspace/pyrax,mandx/pyrax,briancurtin/pyrax,ddaeschler/pyrax,roelvv/pyrax,0dataloss/pyrax,pratikmallya/pyrax,naemono/pyrax,rackerlabs/heat-pyrax,vikomall/pyrax