chore(tests): Update to AngularJS 1.2 for testing

- Use unminified version for easier debugging
chore(alert): Fix test for Angular 1.2

- Since Angular 1.2 is now using the ng-hide class to hide the element,
  it needs to be added into the DOM for styles to be computed.
chore(timepicker): Fix tests for Angular 1.2
chore(datepicker): Fix tests for Angular 1.2
chore(tooltip): Fix tests for AngularJS 1.2

AngularJS 1.2 introduces separate isolate scopes for directives that
require isolate scopes.

See https://github.com/angular/angular.js/commit/909cabd36d779598763cc358979ecd85bb40d4d7
and https://github.com/angular/angular.js/commit/27e9340b3c25b512e45213b39811098d07e12e3b
chore(tabs): Fix tests for AngularJS 1.2

- Use ngBindHtml with $sce as ngBindHtmlUnsafe has been removed

See https://github.com/angular/angular.js/commit/dae694739b9581bea5dbc53522ec00d87b26ae55
chore(tests): move test helpers to one place
chore(all): switch to AngularJS 1.2 version