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>