Feat/decouple pulsar2

Angular services were so far using RabbitMq and/or Pulsar to store logs. The former was seemingly used for debug, the latter for buffering messages that could not be sent to any other online group member.

We plan to keep Pulsar, as it can still prove useful. The RabbitMQ adapter is removed in this MR. The environment is changed to reflect that.

related to feat/decouple-pulsar