Improve sta_name argparse variable

Signed-off-by: Matthew Stidham <stidmatt@gmail.com>

py-scripts/sta_scan_test.py

@@ -131,7 +131,8 @@ def main():
         ''')
 
     parser.add_argument('--mode', help='Used to force mode of stations')
-    parser.add_argument('--sta_name', help='Name of station to be used', default=["sta0000"])
+    parser.add_argument('--sta_name', help='Optional: User defined station names, can be a comma or space separated list', nargs='+',
+                        default=["sta0000"])
 
     args = parser.parse_args()