chore(tooltip): Fix tests for AngularJS 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

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