[config] Add 'feature' subcommand (sonic-net#746)

config/main.py

@@ -2415,6 +2415,23 @@ def delete(ctx):
     sflow_tbl['global'].pop('agent_id')
     config_db.set_entry('SFLOW', 'global', sflow_tbl['global'])
 
+#
+# 'feature' command ('config feature name state')
+# 
+@config.command('feature')
+@click.argument('name', metavar='<feature-name>', required=True)
+@click.argument('state', metavar='<feature-state>', required=True, type=click.Choice(["enabled", "disabled"]))
+def feature_status(name, state):
+    """ Configure status of feature"""
+    config_db = ConfigDBConnector()
+    config_db.connect()
+    status_data = config_db.get_entry('FEATURE', name)
+
+    if not status_data:
+        click.echo(" Feature '{}' doesn't exist".format(name))
+        return
+
+    config_db.mod_entry('FEATURE', name, {'status': state})
 
 if __name__ == '__main__':
     config()