Restore auth_uri config option
Restore auth_uri config option

Restore auth_uri config option which must be defined in
    [keyston_authtoken] section.

Change-Id: Ic3502f8ee9dfb0681dfc80cc07a409050db6505c

chenyujie/hybrid-murano,DavidPurcell/murano_temp,DavidPurcell/murano_temp,NeCTAR-RC/murano,olivierlemasle/murano,satish-avninetworks/murano,sajuptpm/murano,NeCTAR-RC/murano,satish-avninetworks/murano,chenyujie/hybrid-murano,DavidPurcell/murano_temp,olivierlemasle/murano,sajuptpm/murano,olivierlemasle/murano,satish-avninetworks/murano,sergmelikyan/murano,NeCTAR-RC/murano,sergmelikyan/murano,openstack/murano,olivierlemasle/murano,satish-avninetworks/murano,NeCTAR-RC/murano,telefonicaid/murano,openstack/murano,telefonicaid/murano,DavidPurcell/murano_temp