compiler leaks isolate accessors into the outer scope

[IgorMinar]

first reported at [here[(https://github.com/danielzen/angular.js/commit/56ef961daa30983aef884052c3c189a51cd53e67#commitcomment-1111304).

looks like when there is a name collision between the accessor name and the directive name (or something of that sort) we leak the accessor to the outer scope.

example + test: http://jsfiddle.net/IgorMinar/kQpFW/3/

[IgorMinar]

turns out that this is most likely due to having the directives on the root element of the template.