Move everything to CircleCI

[tpendragon]

• [x] hydra-derivatives
  • [x] https://github.com/samvera/hydra-derivatives/issues/200
• [x] questioning_authority
  • [x] https://github.com/samvera/questioning_authority/pull/222
• [x] hydra-head
• [x] browse-everything
  • [x] https://github.com/samvera/browse-everything/issues/271
• [x] noid-rails
  • [x] https://github.com/samvera/noid-rails/pull/89
• [x] hydra-pcdm
  • [x] https://github.com/samvera/hydra-pcdm/pull/269
• [x] active_fedora
• [x] ldp (Trey)
• [x] solrizer
• [x] rubydora
• [x] hydra-role-management
• [x] hydra-works
• [x] hydra-file_characterization
• [x] hydra-editor
• [x] om
• [x] samvera.github.io
• [x] valkyrie

[jrgriffiniii]

Blocked by https://github.com/samvera/hydra-derivatives/issues/202