ENH: Add comments to MR template

Summary

Comment out sections of the merge request template that are sometimes not necessary. For example in the case of this MR.

Rationale

Clearer MR descriptions for small patches.

Implementation Details

Classes and files

Applications

Tests

Documentation

Additional notes

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement

.gitlab/merge_request_templates/request_for_changes.md

@@ -10,23 +10,23 @@ Explain the rationale for the changes (possible link to a Request For Comments o
 
 #### Classes and files
 
-Give an overview of the implementation: main changes made to classes, files and modules. Do not paste complete diff, as it is available in the merge request already.
+<!--- Give an overview of the implementation: main changes made to classes, files and modules. Do not paste complete diff, as it is available in the merge request already. -->
 
 #### Applications
 
-Describe any changes made to existing applications, or new applications that have been added.
+<!--- Describe any changes made to existing applications, or new applications that have been added. -->
 
 #### Tests
 
-Describe the testing strategy for new features.
+<!--- Describe the testing strategy for new features. -->
 
 ### Documentation
 
-List or link documentation modifications that were made (doxygen, example, Software Guide, application documentation, CookBook).
+<!--- List or link documentation modifications that were made (doxygen, example, Software Guide, application documentation, CookBook). -->
 
 ### Additional notes
 
-List remaining open issues if any, and additional notes.
+<!--- List remaining open issues if any, and additional notes. -->
 
 ### Copyright