Directives for jvm int/exit handler properties

e.g.
 
```nginx
jvm_init_handler_property redis.cluster 'redis1:6379,redis2:6379,redis3:63379';

jvm_exit_handler_property clear.tmp true;

```

```java
public class MyJvmInitHandler implements  NginxJavaRingHandler, Configurable { 

   .....

     public void config(Map<String, String> cfg) {
        String redisCluster = cfg.get("redis.cluster");
    }
}
```
