Remove Oracle Java and Djatoka

[noahwsmith]

Issue description

Oracle Java license change has pushed us to https://openjdk.java.net/. This necessitates completing the removal of Djatoka, which depends on Oracle Java. Djatoka is currently our source for Kakadu binaries, so we need to account for that loss as well.

Djatoka/Kakadu contribute the following functionality in a traditional Islandora system:

• Djatoka: Tiling Server (already replaced in ISLE by Cantaloupe)
• Kakadu: kdu_compress and kdu_expand for reading and writing JP2 files (including derivative generation)

We propose the following project plan:

1. Remove Djatoka entirely, including the kakadu binaries it supplies
2. Install OpenJpeg (https://www.openjpeg.org/) to provide opj_compress and opj_decompress
3. Switch to OpenJDK for Java across the board
4. Ensure that ImageMagick is sufficient for JP2 derivative generation, in conjunction with OpenJpeg (as necessary)
5. Update install/migrate vsets and documentation to set ensure that the new suite works out of the box for new ISLE adopters
6. Provide release notes detailing steps necessary to update existing ISLE systems to use this new suite

This work should be done in conjunction with a task to clean up the Cantaloupe 4 installation. And after Djatoka and Kakadu are removed, all associated Issues can be closed as wontfix.

[noahwsmith]

Update install/migrate vsets and documentation to set ensure that the new suite works out of the box for new ISLE adopters

Sub-bullets

• Islandora Paged Content Module - maybe no change but testing required after removing djatoka (and vset in install/migrate scripts)
• Islandora Large Image Solution Pack - kakadu switch in vsets, testing
• Viewers should already be handled by prev switch

[bseeger]

I think this was completed via this PR: https://github.com/Islandora-Collaboration-Group/isle-imageservices/pull/5

@noahwsmith - is this ready to be closed?