Fix unreported failures in RBAC test suite

The org.jboss.as.test.integration.mgmt.access.PropertiesRoleMappingTestCase is run 3 times in the rbac test suite accross 3 different surefire execution:

• one as PropertiesRoleMappingTestCase
• one in LdapRoleMappingG2UTestCase Suite
• one in LdapRoleMappingU2GTestCase Suite

We had an issue with WFCORE-3705 that was making the test fails for the 2 ldap suites.
The maven execution was failing but our CI was reporting that the test suite was failing as TeamCity does not distinguish the test execution across different suites.

The regression was identified only during the release of WildFly Core 5.0.0.Alpha3.
The rbac test suite should reliably report any failures and we need to make sure that our CI handle them properly.