public void setForceUsernameToLowercase(boolean forceUsernameToLowercase) {
    this.forceUsernameToLowercase = forceUsernameToLowercase;
  }
Sets whether the username retrieved from the LDAP server during authentication is to be forced
to all lowercase characters before assigning to the authenticated user.

@param forceUsernameToLowercase true to force the username to be lowercase; false to leave as
                                it was when retrieved from the LDAP server
ambari-server/src/main/java/org/apache/ambari/server/security/authorization/LdapServerProperties.java