public KerberosPrincipalDescriptor getPrincipalDescriptor() {
    return principal;
  }
Gets the KerberosPrincipalDescriptor related to this KerberosIdentityDescriptor

@return the KerberosPrincipalDescriptor related to this KerberosIdentityDescriptor
ambari-server/src/main/java/org/apache/ambari/server/state/kerberos/KerberosIdentityDescriptor.java