Try using transaction in non-js specs.
Add redis tag to specs and use.
Merge branch 'master' into truncation-or-transaction

Conflicts:
	engines/supporting_information/spec/controllers/supporting_information/files_controller_spec.rb
Make sure with_aws_cassette specs are redis: true
Merge pull request #539 from Tahi-project/truncation-or-transaction

Truncation or transaction