Alphabetize core component list

[mark-dce]

Alphabetize the list (for lack of a better ordering scheme). Also removes solrizer which has been deprecated.

MHB - sorry the diff isn't very useful, I really just went through and moved the blocks for each gem so they'd be in alphabetical order:

• active_fedora
• browse-everything
• hydra-derivatives
• hydra-editor
• hydra-file_characterization
• hydra-head
• hydra-pcdm
• hydra-role-management
• hydra-works
• iiif_manifest
• ldp
• noid-rails
• om
• questioning_authority
• rubydora
• samvera.github.io
• valkyrie