Reports duplicate bean names defined in the application context.

Example:

  <beans profile="PROD">
    <bean class="..." id="duplicatedName"/>  <!--  error -->
    <bean class="..." name="foo_name, duplicatedName"/> <!--  'duplicatedName' error -->
    <bean class="..." id="toBeAliased"/>

    <alias alias="duplicatedName" name="toBeAliased"/> <!--  'duplicatedName' error -->
  </beans>