message: QuestionTextBase - refactored placeHolder as - fixed eslint
diff: import { Question } from "./question";
  import { property, Serializer } from "./jsonobject";
  -import { QuestionFactory } from "./questionfactory";
  -import { LocalizableString } from "./localizablestring";
  import { Helpers } from "./helpers";
  import { CssClassBuilder } from "./utils/cssClassBuilder";
  