DRILL-6241: Saffron properties config has the excessive permissions
DRILL-6241: Saffron properties config has the excessive permissions

changed saffron.properties permission to 640

closes #1167

mapr/incubator-drill,kkhatua/drill,paul-rogers/drill,superbstreak/drill,nagix/drill,pwong-mapr/incubator-drill,superbstreak/drill,apache/drill,mapr/incubator-drill,mapr/incubator-drill,tgrall/drill,pwong-mapr/incubator-drill,kkhatua/drill,pwong-mapr/incubator-drill,pwong-mapr/incubator-drill,pwong-mapr/incubator-drill,cchang738/drill,kkhatua/drill,vdiravka/drill,ppadma/drill,cchang738/drill,vvysotskyi/drill,vdiravka/drill,superbstreak/drill,tgrall/drill,cchang738/drill,vdiravka/drill,vvysotskyi/drill,paul-rogers/drill,Ben-Zvi/drill,ppadma/drill,johnnywale/drill,parthchandra/incubator-drill,vdiravka/drill,mapr/incubator-drill,pwong-mapr/incubator-drill,Agirish/drill,Ben-Zvi/drill,parthchandra/drill,johnnywale/drill,tgrall/drill,arina-ielchiieva/drill,mapr/incubator-drill,nagix/drill,ppadma/drill,kkhatua/drill,parthchandra/incubator-drill,sohami/drill,parthchandra/drill,apache/drill,ppadma/drill,nagix/drill,vvysotskyi/drill,Agirish/drill,johnnywale/drill,Ben-Zvi/drill,sohami/drill,johnnywale/drill,arina-ielchiieva/drill,sohami/drill,Agirish/drill,tgrall/drill,parthchandra/drill,paul-rogers/drill,johnnywale/drill,paul-rogers/drill,sohami/drill,Ben-Zvi/drill,apache/drill,sohami/drill,apache/drill,apache/drill,tgrall/drill,superbstreak/drill,parthchandra/incubator-drill,parthchandra/drill,arina-ielchiieva/drill,arina-ielchiieva/drill,paul-rogers/drill,Ben-Zvi/drill,nagix/drill,vvysotskyi/drill,paul-rogers/drill,nagix/drill,arina-ielchiieva/drill,nagix/drill,Ben-Zvi/drill,cchang738/drill,superbstreak/drill,Agirish/drill,cchang738/drill,arina-ielchiieva/drill,cchang738/drill,kkhatua/drill,Agirish/drill,vvysotskyi/drill,superbstreak/drill,ppadma/drill,apache/drill,parthchandra/incubator-drill,vdiravka/drill,Agirish/drill,parthchandra/incubator-drill,sohami/drill,mapr/incubator-drill,ppadma/drill,parthchandra/drill,kkhatua/drill,parthchandra/drill,vvysotskyi/drill