Resource discovery fails if resource key is longer then the maximum length (500)

Issue

• JON - discovery component is longer than the maximum length (500)
• We are getting the following error:

2015-06-12 16:50:40,792 INFO  [InventoryManager.discovery-1] (rhq.core.pc.inventory.RuntimeDiscoveryExecutor)- Executing runtime discovery scan rooted at [platform]...
2015-06-12 16:50:41,140 WARN  [InventoryManager.discovery-1] (rhq.core.pc.inventory.InventoryManager)- Failure during discovery for [Camel Endpoint] Resources - failed after 0 ms.
java.lang.Exception: Discovery component invocation failed.
        at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:297)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: Plugin error: Resource key [...] specified by [{Camel}Camel Endpoint] discovery component is longer than the maximum length (500).
        at org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails.setResourceKey(DiscoveredResourceDetails.java:146)
        at org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails.<init>(DiscoveredResourceDetails.java:98)
        at org.rhq.plugins.jmx.MBeanResourceDiscoveryComponent.performDiscovery(MBeanResourceDiscoveryComponent.java:181)
        at org.rhq.plugins.jmx.MBeanResourceDiscoveryComponent.discoverResources(MBeanResourceDiscoveryComponent.java:98)
        at org.jbosson.plugins.fuse.FuseMBeanDiscoveryComponent.discoverResources(FuseMBeanDiscoveryComponent.java:54)
        at sun.reflect.GeneratedMethodAccessor49.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.rhq.core.pc.util.DiscoveryComponentProxyFactory$ComponentInvocationThread.call(DiscoveryComponentProxyFactory.java:293)
        ... 4 more

• Resource discovery fails if resource key is longer then the maximum length (500)