Description of problem:
The plugin import of resources with parent-resource-type nested more than one level inside another entity from the same plugin fails.

Here shortened example of such plugin descriptor:
<server name="JBossAS7 Host Controller">
 <server name="Managed Server"/>
</server>

<service name="Transactions Subsystem (Managed)">
 <runs-inside>
  <parent-resource-type name="Managed Server" plugin="jboss-as-7"/>
 </runs-inside>
</service>

The following error is observed in the logs:
Caused by: java.lang.RuntimeException: Couldn't persist type [{jboss-as-7}Transactions Subsystem (Managed)] because parent [{jboss-as-7}Managed Server] wasn't already persisted. 

How reproducible:
Every time

Steps to Reproduce:
1. Write a plugin descriptor based on the example above
2. Compile the plugin
3. Attempt to deploy de plugin
  
Actual results:
Failure to import the plugin with the error noted above.

Expected results:
Th plugin gets imported correctly.



Additional info:

The following plugin descriptor will NOT fail to import:

<server name="JBossAS7 Host Controller">
 <server name="Managed Server"/>
</server>

<server name="JBossAS7 Standalone Server">
</server>


<service name="Transactions Subsystem (Managed)">
 <runs-inside>
  <parent-resource-type name="JBossAS7 Standalone Server" plugin="jboss-as-7"/>
  <parent-resource-type name="Managed Server" plugin="jboss-as-7"/>
 </runs-inside>
</service>


The main difference here is that the service references both a top level server and a nested server. When runs-inside references another top level resource the import will not fail.