Wait scheduled timers completed
Remove unused
Merge pull request #2620 from tricknotes/remove-unused

Remove unused
Merge pull request #2619 from tricknotes/wait-scheduled-timers

Wait scheduled timers completed
fix DeprecatedContainer

It was correctly emiting deprecation warnings, and invoking the correct
container methods, but was not returning there result;
Merge pull request #2621 from stefanpenner/fix_deprecated_container_with_tests

fix DeprecatedContainer
Ember testing update url in visit helper
Merge pull request #2627 from teddyzeenny/visit-url

Ember testing update url in visit helper