Description of problem:
When the agent runs server discovery it logs a warning saying it can't read a file it does not have read permissions for. This should not happen. The agent has no reason to read the files:

    <JBOSS_HOME>/{domain,standalone}/configuration/mgmt-users.properties

Version-Release number of selected component (if applicable):
3.2.0.GA

How reproducible:
Always

Steps to Reproduce:
1. Install JBoss EAP 6 server using the user jbossadmin
2. Install JBoss ON agent using the user jbossonadmin
3. Start JBoss EAP 6 standalone server and JBoss ON agent

Actual results:
Every 15 minutes agent throws the following warning:

    WARN  [ResourceDiscoveryComponent.invoker.daemon-32] (rhq.modules.plugins.jbossas7.StandaloneASDiscovery)- Management user properties at [/opt/jboss/jboss-eap/jboss-eap-6.2/standalone/configuration/mgmt-users.properties] is not readable.

Expected results:
No warnings.

Additional info:
This is because JBoss EAP's users, groups, and roles configuration files are read/write by owner only. Meaning that the jbossadmin user owns these files and the jbossonadmin user does not have permission to read these files.

The plug-in should not log this warning. Perhaps it can capture this at debug or trace logging?