Client for graph ql spring book example

1. Clone the graphql-java tutorial and start the service ./gradlew bootRun
2. On the clone of this repo run: /gradlew downloadApolloSchema -Pcom.apollographql.apollo.endpoint=http://localhost:8080/graphql -Pcom.apollographql.apollo.schema=src/main/graphql/com/example/schema.json to download the schema (or just the one in git already)
3. Run the Launcher class from the IDE

Known issue

The application does not exit