Load all plugins in the 'plugins' folder.

def load_plugins(self, args=None):
        """Load all plugins in the 'plugins' folder."""
        for item in os.listdir(plugins_path):
            if (item.startswith(self.header) and
                    item.endswith(".py") and
                    item != (self.header + "plugin.py")):
                # Load the plugin
                self._load_plugin(os.path.basename(item),
                                  args=args, config=self.config)

        # Log plugins list
        logger.debug("Active plugins list: {}".format(self.getPluginsList()))