Add ability to override or hydrate transition to authentication route (#1278)
Add ability to override or hydrate transition to authentication route (#1278)

* Adds method to `authenticated-route-mixin` called `triggerAuthentication` which will now handle the actual transition to the configured authentication route
Adds notes to the README.md describing this change and its purpose
Adds test to the `authenticated-route-mixin` tests to ensure that this method is in fact called
fixes #1268

* Removes notes around the `triggerAuthentication` method from the README
Removes the params definition from jsdoc for `triggerAuthentication`
Ensures the `triggerAuthentication` is marked as @protected
Removes tests for the `triggerAuthentication` method

* Removes non needed spy from `authenticated-route-mixin` tests

omniboard/ember-simple-auth,simplabs/ember-simple-auth,clairton/ember-simple-auth,omniboard/ember-simple-auth,clairton/ember-simple-auth,stevenwu/ember-simple-auth,stevenwu/ember-simple-auth,simplabs/ember-simple-auth