File path checking enhancements

[jimk-bdrc]

Is your feature request related to a problem? Please describe.
There are still cases where content is uploaded to BUDA that their IIIFServer cannot support:
See buda-base/archive-ops#876 - this will be fixed in the AO processing scripts, but it should be checked by audit tool too.

As well, #177 should expand the list of allowable file patterns to include separators in file names.

Describe the solution you'd like

• Implement this issue and File name format test must support separators #177
• Test that image group names under images/ match the BUDA images (use BUDA to get the image group names for a work).

If lower_case(source_image_group_dir_name) == lower_case(BUDA_image_group)  && (source_image_group != BUDA_image_group_name)
{ 
              fail test
}

Describe alternatives you've considered
archive-ops/#876 requested that Audit tool this "at sync" time, but AT has no knowledge of its calling context. A future release will provide an updated syntax for explicitly including and excluding tests.