read_password needs to store in .localrc.auto if local.conf is used.
read_password needs to store in .localrc.auto if local.conf is used.

when running stack.sh with no passwords in local.conf
read_password() creates localrc and local.conf is ignored

Change-Id: I25ad07569d2b42b190449591d5a01ade8022392c

thomasem/devstack,nawawi/openstack,HPCHub/devstack,bigswitch/devstack,ozamiatin/devstack,upadhyay-prashant/devstack,bq-xiao/devstack,mmasaki/devstack,dtroyer/devstack,costingalan/devstack,bljgaurav/openstack-test,liuquansheng47/devstack,group-policy/devstack,affo/devstack,andrewrothstein/devstack,mc2014/devstack,promptworks/devstack,TwinkleChawla/devstack,group-policy/devstack,wenhuizhang/devstack,innodee/openstackk,nawawi/openstack,bq-xiao/devstack,pczerkas/devstack,herrsechs/devstack,avvocatodemarchis/devstack,costingalan/devstack,LoHChina/devstack,TwinkleChawla/devstack,flavio-fernandes/devstack,eharney/devstack,olivierlemasle/devstack,Mahito/devstack,rushiagr/devstack,mmasaki/devstack,mc2014/devstack,affo/devstack,thomasem/devstack,atulpatil301/devstack,avvocatodemarchis/devstack,bswartz/devstack,liuquansheng47/devstack,Juniper/devstack,vishnugonela/devstack,rushiagr/devstack,bljgaurav/openstack-test,samgoon/devstack,kplus/devstack-moonshot,mssumanth/devstack,mssumanth/devstack,samgoon/devstack,pacinete/devstack,BSJAIN92/OpenStack,dirkmueller/devstack,JioCloud/devstack,williamthegrey/devstack,noironetworks/devstack,parul24/devstack,richliu/devstack,promptworks/devstack,eshnil2000/devstack,parul24/devstack,Mahito/devstack,varunarya10/devstack,sequenceiq/devstack,tianweizhang/devstack,tianweizhang/devstack,CloudServer/devstack,prithivm/branch01,bswartz/devstack,neerja28/Devstack_GlusterFS,BSJAIN92/OpenStack,wenhuizhang/devstack,nuxeh/devstack,noironetworks/devstack,jamielennox/devstack,nuxeh/devstack,bigswitch/devstack,kplus/devstack-moonshot,pombredanne/devstack,herrsechs/devstack,andrewrothstein/devstack,vsham20/devstack,sc68cal/devstack,CloudServer/devstack,flavio-fernandes/devstack,pczerkas/devstack,openstack-dev/devstack,openstack-dev/devstack,vsham20/devstack,ozamiatin/devstack,dtroyer/devstack,upadhyay-prashant/devstack,eharney/devstack,vishnugonela/devstack,atulpatil301/devstack,neerja28/Devstack_GlusterFS,j4/devstack,NaokiMiyata/devstack,sequenceiq/devstack,NaokiMiyata/devstack,pacinete/devstack,LoHChina/devstack,prithivm/branch01,pombredanne/devstack,HPCHub/devstack,virtualopensystems/devstack,olivierlemasle/devstack,dirkmueller/devstack,srics/devstack,richliu/devstack,j4/devstack,varunarya10/devstack,sc68cal/devstack