The class com.sun.jmx.remote.security.MBeanServerFileAccessController performs
access control checks based on a properties file which defines pairs of roles
and passwords. The roles must match any of the principal names defined by the
JMXPrincipals present in the Subject.

These checks should not be constrained to JMXPrincipals only. Any principal,
of any type, present in the authenticated Subject should be eligible to be
consulted when getting access rights from the access file.