Refactor seeds and sample data
[core] Try to fix failing specs
Move localeapp to gemspec instead of Gemfile
[spec/requests] Fix csv_spec
[spec/requests] Fix exam_portions_spec
Try to fix student_worker under postgres
Clean migrations
Try to fix posgresql error on address
Clean models and remove unused gems
[grading] fixing issues with bootstrap bug for toggle
Try to fix posgresql failures
Merge remote-tracking branch 'kalkov/develop'

Conflicts:
	core/config/locales/en.yml
Merge remote-tracking branch 'tapalilov/develop'