allow nodelist to accept explicit hostlist on command line
allow nodelist to accept explicit hostlist on command line

salarcon215/operator,jheretic/operator,jheretic/operator,critzo/operator,nkinkade/operator,stephen-soltesz/operator,critzo/operator,m-lab/operator,nkinkade/operator,salarcon215/operator,m-lab/operator,stephen-soltesz/operator