polus plugins refresh() does not work as expected

[agerardin]

** Issue on the polus.plugin tool **

Summary

polus plugin refresh() does not refresh the list of plugins on the first run but only the second time around.

What is the expected correct behavior?

polus plugin refresh() should populate the plugin list correctly on the first run

Steps to reproduce

        import polus.plugins as pp
        image_assembler_plugin_name, image_assembler_plugin_url  = ("ImageAssembler",  "https://raw.githubusercontent.com/agerardin/polus-plugins/new/image-assembler-plugin-1.4.0-dev0/transforms/images/image-assembler-plugin/plugin.json")
        logger.debug(f"installing plugin {image_assembler_plugin_name}")
        pp.submit_plugin(image_assembler_plugin_url)

        # TODO CHECK pp.refresh() still not working. Need to be run twice.
        pp.refresh()
        logger.info(f"polus plugins installed : {pp.list}")