Fix several issues for first-time development machine installation:
1. Rename spec/fixtures/user.csv to users.csv.
2. Move the db:fixtures:load task out of rspec.rake in vendor/plugins/blacklight/lib/tasks and into lib/tasks/db.rake for specifically running 'bundle exec rake db:fixtures:load'.
3. Created a full solr and fedora setup rake task in lib/tasks/hydra_jetty.rake for running 'bundle exec rake hydra:jetty:setup'.