Fix http://github.com/rantav/hector/issues#issue/26 getPackage() May …

…return a null at JmxMonitor constructor.

(cherry picked from commit ac733cd)

Signed-off-by: Ran Tavory <rantav@gmail.com>

src/main/java/me/prettyprint/cassandra/service/JmxMonitor.java

@@ -34,7 +34,7 @@ private JmxMonitor() {
     mbs = ManagementFactory.getPlatformMBeanServer();
     this.cassandraClientMonitor = cassandraClientMonitor;
     try {
-      registerMonitor(CassandraClientMonitor.class.getPackage().getName(), "hector",
+      registerMonitor("me.prettyprint.cassandra.service", "hector",
           cassandraClientMonitor);
     } catch (MalformedObjectNameException e) {
       log.error("Unable to register JMX monitor", e);