As a user of the event platform I want wikimedia-event-utilities to have all the functionalities that event-gate provides so that I can use my own kafka producers to ship sane&well-formed events.

In the context of a flink application it is generally simpler to use existing kafka producer, but there needs to be tools available to make sure the json events that are produced are valid regarding the event-platform guidelines and wikimedia-event-utilities seems to be the best place to put these tools for JVM based applications.

AC:

• there should be a way to validate an event against its json schema
• there should utilities to help prefixing the kafka topic with the DC name
• stream config should be used to restrict what types of events are allowed in which streams
• anything that would help to prevent shipping invalid events