Update Tomcat groups_vars for Cantaloupe 4+

[ruebot]

GitHub Issue: https://github.com/Islandora/documentation/issues/1687

What does this Pull Request do?

Changes a playbook variable for Cantaloupe that was changed in Cantaloupe 3.4.x -> 4.0.x updates.

Depends on: https://github.com/Islandora-Devops/ansible-role-cantaloupe/pull/5

With https://github.com/Islandora-Devops/ansible-role-cantaloupe/pull/5 it resolves https://github.com/Islandora/documentation/issues/1687.

What's new?

Cantaloupe 4.1.7!

How should this be tested?

• Update $VagrantBox to use ubuntu/bionic64 in Vagrantfile
• Update repo and branch for Cantaloupe playbook in requirements.yml

• Add an Islandora Object, with an image, and you should see this:

• Go to http://localhost:8080/cantaloupe/admin and use admin/islandora and you should see this:

Additional Notes:

An issue with the Grok playbook came up while I was watching the Cantaloupe logs on this; /usr/local/bin/opj_decompress was not there. I noticed that the binaries that build grok from source have changed from being prefixed with opj to grk. Not sure why that playbook doesn't fail here. Happy to create an issue for that, and get a PR in as well if y'all want.

Interested parties

@seth-shaw-unlv @elizoller