Add required_files to addName (#7264)

Author: natefoo

tools/add_input_name_as_column/add_input_name_as_column.xml

@@ -3,8 +3,11 @@
     <requirements>
         <requirement type="package" version="3.7">python</requirement>
     </requirements>
+    <required_files>
+        <include path="add_input_name_as_column.py"/>
+    </required_files>
     <command><![CDATA[
-python '$__tool_directory__/'add_input_name_as_column.py
+python '$__tool_directory__/add_input_name_as_column.py'
 --input '$input'
 --label '$input.element_identifier'
 --output '$output'