New Features:
- Configuration of component/service/*.graphql.xml to define GraphQL Schema which utilizing GraphQL-Java
- Added Timestamp GraphQLScalarType
- *.graphql.xml can be hot reloaded by configuring expire-time-idle of cache service.graphql.schema.definition and service.graphql.graphql
- Auto add all of entity as GraphQLObjectType
- Extend Object-Type to add field
- Extend Field by adding data-fetcher
- Add entity method for data-fetcher
- Add test cases