Correct spelling in the test-upgrade script
Correct spelling in the test-upgrade script

change user_extra to user_extras
change RPCD_DUR to RPCD_DIR
also, ensure that the defaults are installed

Connects https://github.com/rcbops/rpc-openstack/issues/1380

hughsaunders/rpc-openstack,jacobwagner/rpc-openstack,xeregin/rpc-openstack,cloudnull/rpc-openstack,major/rpc-openstack,cloudnull/rpc-openstack,mancdaz/rpc-openstack,xeregin/rpc-openstack,cfarquhar/rpc-openstack,jacobwagner/rpc-openstack,xeregin/rpc-openstack,galstrom21/rpc-openstack,xeregin/rpc-openstack,major/rpc-openstack,sigmavirus24/rpc-openstack,prometheanfire/rpc-openstack,robb-romans/rpc-openstack,BjoernT/rpc-openstack,prometheanfire/rpc-openstack,git-harry/rpc-openstack,git-harry/rpc-openstack,BjoernT/rpc-openstack,hughsaunders/rpc-openstack,galstrom21/rpc-openstack,sigmavirus24/rpc-openstack,cfarquhar/rpc-openstack,sigmavirus24/rpc-openstack,shannonmitchell/rpc-openstack,sigmavirus24/rpc-openstack,rcbops/rpc-openstack,shannonmitchell/rpc-openstack,robb-romans/rpc-openstack,rcbops/rpc-openstack,mancdaz/rpc-openstack