More stable and fault-tolerant way for communication between master/workers/jobs.
Akka-cluster was replaced by akka-remote.
todo before merge:
[x] fix/migrate tests
[x] return state changes logging for jobs
[x] implement circuit-breaker like logic for handling connection failures for context frontend (restart connection by timeout, move frontend to special broken state if it reaches max allowed failures)
More stable and fault-tolerant way for communication between master/workers/jobs. Akka-cluster was replaced by akka-remote.
todo before merge:
brokenstate if it reaches max allowed failures)