Create a TCK

[ptitFicus]

A Technology Compatibilty Kit would be helpfull to ensure every implementations of scribre-core are corrects.

This would be a great help to #3.

[ptitFicus]

Some work is done on #33 , but some works remains:

• Setup with TestNg (Junit is not an option here since we need to inherit tests, which is not possible in Junit5)
• Command submission should generate & write event
• Invalid command submission should not write anything
• Event should be published in Kafka, even if it's down at first
• Aggregation should rebuild state correctly
• Command submission should be rejected if database is down
• In transaction projections should be updated
• Eventually consistent projections should be updated event if Kafka is down at first
• Consumer should receive published event, even if Kafka is down at first

Implementation are done for both in memory and non-reactive jooq implementation, therefore we need to

• Implement the above tasks for jooq reactive client