Description of problem:
Frequently, when an EAP host controller is restarted the resource page will contain a yellow ! message icon stating:

org.rhq.core.pluginapi.inventory.InvalidPluginConfigurationException: The original product type discovered for this AS7 server was JBoss EAP 6, but the server is now reporting its product type is [JBoss AS 7].
	at org.rhq.modules.plugins.jbossas7.BaseServerComponent.validateServerAttributes(BaseServerComponent.java:182)
	at org.rhq.modules.plugins.jbossas7.BaseServerComponent.getAvailability(BaseServerComponent.java:116)
	at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:616)
	at org.rhq.core.pc.inventory.ResourceContainer$ComponentInvocationThread.call(ResourceContainer.java:634)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:636)

Version-Release number of selected component (if applicable):
4.4.0.JON312GA

How reproducible:
Almost always

Steps to Reproduce:
1.  Configure EAP 6.0.1 domain with:
        Host Controller: master (host-master.xml)
        Host Controller: slave (host-slave.xml)
2.  Start EAP domain.
3.  Start JON system.
4.  Import EAP host controller master and slave.
5.  Set user and password for host controller master (domain controller).
6.  Verify that both master and slave show as available.
7.  From outside of JON, shutdown the slave host controller
8.  Wait 2 minutes
9.  From outside of JON, start the slave host controller
  
Actual results:
From the UI, the host controller resource page contains a message icon with a message similar to: AVAILABILITY_CHECK    Apr 3, 2013 5:25:23 PM    The original product type discovered for this AS7 server was JBoss EAP 6, but the server is now reporting its product type is [JBoss AS 7].

Agent debug log will contain a complete exception:

DEBUG [InventoryManager.availability-1] (rhq.core.pc.inventory.ResourceContainer$ResourceComponentInvocationHandler)- Call to [org.rhq.modules.plugins.jbossas7.HostControllerComponent.getAvailability()] with args [] failed.
java.util.concurrent.ExecutionException: org.rhq.core.pluginapi.inventory.InvalidPluginConfigurationException: The original product type discovered for this AS7 server was JBoss EAP 6, but the server is now reporting its product type is [JBoss AS 7].

Expected results:
No UI warning/error.

Additional info:
This appears to be due to the product-name attribute not being available while the server is starting up or shutting down and our default value is AS7. This results in the exception being thrown falsely and making its way back to the UI.