Currently downgraded ng2 elements fail inside a ui-router view because they are unable
to require an ng2 Injector via the require attribute of the DDO, because ui-router compiles
its templates before they are inserted in a ui-view. This adds a "fallback" behavior if
a parent injector cannot be found to go to the root ng2 Injector.
Delays NG1 Directive controller instatiation where possible and pre-link function always
to the ngOnInit() lifecycle hook. This way bindings are always available on $scope in both
the controller and the link function.
the bundles have source mpas disabled for now because when we downlevel
the esm bundle to es5 tsc doesn't consider the original source map so
we end up with a source map pointing to the esm bundle instead which is
not useful.