WIP: [#7090] Ensure post-process resources are included in the jar, and en…

[mattrpav]

…sure minify runs before bundle plugin

TODO:

• [ ] Test deploying into OSGi runtime environment
• [ ] Test using a decently complicated application

After this change, an unzip of wicket-core-9..-SNAPSHOT.jar has these resources:

% find . -name "*.js" -print
./org/apache/wicket/markup/html/form/CheckSelector.js
./org/apache/wicket/markup/html/form/CheckSelector.min.js
./org/apache/wicket/markup/html/form/upload/FilesSelectedBehavior.min.js
./org/apache/wicket/markup/html/form/upload/MultiFileUploadField.js
./org/apache/wicket/markup/html/form/upload/resource/FileUploadToResourceField.min.js
./org/apache/wicket/markup/html/form/upload/resource/FileUploadToResourceField.js
./org/apache/wicket/markup/html/form/upload/MultiFileUploadField.min.js
./org/apache/wicket/markup/html/form/upload/FilesSelectedBehavior.js
./org/apache/wicket/markup/html/pages/wicket-browser-info.min.js
./org/apache/wicket/markup/html/pages/wicket-browser-info.js
./org/apache/wicket/resource/jquery/jquery-1.12.4.min.js
./org/apache/wicket/resource/jquery/jquery-2.2.4.min.js
./org/apache/wicket/resource/jquery/jquery-1.12.4.js
./org/apache/wicket/resource/jquery/jquery-3.7.1.js
./org/apache/wicket/resource/jquery/jquery-2.2.4.js
./org/apache/wicket/resource/jquery/jquery-3.7.1.min.js
./org/apache/wicket/ajax/res/js/wicket-ajax-jquery.min.js
./org/apache/wicket/ajax/res/js/wicket-ajax-jquery.js