Allow some blockhound block methods

- Looks like some tests fails with redis
  as new lettuse driver, during connect phase,
  will block as there's a timeout which cause
  a block within netty internals(which a bit weird).
- Time of this commit block error came from
  https://github.com/netty/netty/blame/4.1/common/src/main/java/io/netty/util/HashedWheelTimer.java#L349

spring-statemachine-data/redis/src/test/resources/META-INF/services/reactor.blockhound.integration.BlockHoundIntegration

@@ -0,0 +1 @@
+org.springframework.statemachine.data.redis.StateMachineBlockHoundIntegration