Refactoring: Remove duplicated lets
Test copy redirects back
Test flash message is displayed
Test copy is created successfully
Refactor copy call
Test mail delivery after copy
Let spec respect delayed jobs
Fix typo
Copy project success/failure mail methods
Add copy project success/failure mail views
Move copy project implementation to DJ
Fix cukes
Move copy project with valid project test to spec
Move CP test with invalid project test to spec
Remove superfluous test

This is tested in the copy project controller spec
Remove superfluous comment
Remove superfluous DJ invokation
disable async jobs in test env by default
Merge pull request #1432 from opf/feature/7496_copy_projects_with_delayed_job

[Fix][DJ] 7496 app server blocked when copying large project