Fix restart of raftable

Author: knizhnik

contrib/mmts/Dockerfile

@@ -31,7 +31,7 @@ USER postgres
 ENV CFLAGS -O0
 WORKDIR /pg
 
-ENV REBUILD 5
+ENV REBUILD 6
 
 RUN cd /pg && \
 	git clone https://github.com/postgrespro/postgres_cluster.git --depth 1 && \

contrib/raftable/worker.c

@@ -443,7 +443,7 @@ static void worker_main(Datum arg)
 	WorkerConfig *cfg = (WorkerConfig *)(arg);
 	StateP state;
 
-	fprintf(stderr, "raftable worker_main(): stop = %d\n", stop);
+	elog(LOG, "Start raftable worker");
 
 	state = (StateP)get_shared_state();