Resolve "Add RabbitMQ for MessageBus triggers"

Closes #1 (closed)

\approve @ds @gislars

Dockerfile

@@ -13,5 +13,5 @@ RUN apt-get update \
     done \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
-RUN pip install pgxnclient
+RUN pip install pgxnclient && echo $PG_CONFIG
 RUN pgxnclient install pg_amqp