ostbuild: further fixes to pull-components
ostbuild: further fixes to pull-components

Call self.parse_config() so that all necessary directories are parsed.

Also don't call nonexistant self.parse_active_branch() and just use
self.active_branch since it's already have been initialized.

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