Add ability to skip downloads of files with specific extensions

[jonapoul]

Category

This change is exactly one of the following (please change [ ] to [x]) to indicate which:

• [x] a bug fix (Fix #...)
• [ ] a new Ripper
• [ ] a refactoring
• [ ] a style change/fix
• [x] a new feature

Description

Added an extra rip.properties key (download.ignore_extensions) with a CSV set of strings. If a download URL in any ripper matches any of these, the download is skipped and a log message is shown in the UI.

Side change - fixed an error with the logger in CoomerPartyRipper

Testing

Required verification:

• [x] I've verified that there are no regressions in mvn test (there are no new failures or errors).
• [x] I've verified that this change works as intended.
  • [ ] Downloads all relevant content.
  • [ ] Downloads content from multiple pages (as necessary or appropriate).
  • [ ] Saves content at reasonable file names (e.g. page titles or content IDs) to help easily browse downloaded content.
• [x] I've verified that this change did not break existing functionality (especially in the Ripper I modified).

Optional but recommended:

• [ ] I've added a unit test to cover my change.