test: Improve pull corruption test
test: Improve pull corruption test

To verify pull with a second repo works.

leandrosansilva/ostree,GNOME/ostree,resin-io/ostree,sujitfulse/ostree,resin-io/ostree,sujitfulse/ostree,gatispaeglis/ostree,leandrosansilva/ostree,leandrosansilva/ostree,gatispaeglis/ostree,gatispaeglis/ostree,leandrosansilva/ostree,leandrosansilva/ostree,resin-io/ostree,gatispaeglis/ostree,GNOME/ostree,resin-io/ostree,sujitfulse/ostree,resin-io/ostree,GNOME/ostree,sujitfulse/ostree,gatispaeglis/ostree,sujitfulse/ostree,GNOME/ostree,gatispaeglis/ostree,GNOME/ostree