fix(lint): enforce that module-private members have @internal.

This is needed to prevent leaking internal APIs to users via our published .d.ts typings.
Fixes #4645

Closes #4989

modules/angular2/src/core/linker/element_injector.ts

@@ -119,11 +119,13 @@ export class DirectiveDependency extends Dependency {
         DirectiveDependency._attributeName(d.properties), DirectiveDependency._query(d.properties));
   }
 
+  /** @internal */
   static _attributeName(properties): string {
     var p = <AttributeMetadata>ListWrapper.find(properties, (p) => p instanceof AttributeMetadata);
     return isPresent(p) ? p.attributeName : null;
   }
 
+  /** @internal */
   static _query(properties): QueryMetadata {
     return <QueryMetadata>ListWrapper.find(properties, (p) => p instanceof QueryMetadata);
   }