Accession with RepositoryFolder

We currently store accession-related images and files in the file repository at a specific path /wiews/${instCode}/acn/${acceNumb}. When loading full accession information, we check if such folder exists (by convention). This makes it difficult when ACCENUMB contains /.

Update AccessionId and add properties:

• private RepositoryFolder repositoryFolder;
• private int imageCount;

The GenesysImageGalleryAspects needs to be extended and the repositoryFolder (of the ImageGallery) recorded with the Accession. The imageCount in the AccessionId should be updated after each image save or delete in the accession's image gallery.