String getJAASConfFilePath() {
    return System.getProperty(KerberosChecker.JAVA_SECURITY_AUTH_LOGIN_CONFIG);
  }
Gets the location of Ambari's JAAS config file.
<p>
This method is mocked in unit tests to avoid having to alter the System properties in
order to locate the test JAAS config file.

@return the path to Ambari's JAAS config file
ambari-server/src/main/java/org/apache/ambari/server/serveraction/kerberos/ConfigureAmbariIdentitiesServerAction.java