Coordinator uses hardcoded async timeout for remote calls to a different LRA coordinator

The LRA Coordinator uses hardcoded 2 seconds timeout for reading remote HTTP calls to a different LRA coordinator,
e.g. https://github.com/jbosstm/narayana/blob/5.10.6.Final/rts/lra/lra-coordinator-jar/src/main/java/io/narayana/lra/coordinator/api/Coordinator.java#L247

The timeout should be configurable.