add serialization support for expression

[penghuo]

Description of changes:*

1. Move all the Function to the new Expression DSL solution which support serialization by default.
2. Add ExprShortValue.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[dai-chen]

Could you help remove the following try-catch in FilterQueryBuilder?

  public QueryBuilder build(Expression expr) {
    try {
      return expr.accept(this, null);
    } catch (IllegalStateException e) {
      //TODO: remove this try-catch once arithmetic and all expressions are serializable
      return null;
    }
  }

[dai-chen]

Thanks for the changes!