chore: run test suite against angular 1.6

[christopherthielen]

A couple of changes in angular 1.6.0 affects the test suite:

• $locationProvider.hashPrefix() now defaults to $locationProvider.hashPrefix("!") instead of the empty string
  • https://docs.angularjs.org/guide/migration#-location-
• Transcluded simple strings are no longer wrapped in a <span>
  • Possibly due to ng-transclude adds span element with ng-scope class angular/angular.js#15223 but we also see spans generated at least since angular 1.2

Not affecting the test suite, but worth mentioning here:

• Rejected Promises without catch blocks print error messages to the console: Possibly unhandled rejection

[mbarakaja]

There is a lot of weird behavior with angular 1.6. Navigating between states using the ui-router API works well.

The problem is when the user introduces the URL manually, in the browser, and the string %2F is inserted, which is equivalent to the / character. But additionally there is an extra # character, which I don't know from where is coming. Maybe that character is making the browser encode the / wrong.

So, for example /#/login goes to /#!#%2Flogin.

There is an issue related to this already; #3203.