Reports configuration conflicts on <bean> attributes.

Example:

  <beans>
    <bean class="java.lang.String" factory-bean="factoryBean"/>
    <!-- Exactly one of 'class' or 'factory-bean' is required -->
    <bean factory-bean="factoryBean" id="missingFactoryMethod"/> //When factory-bean exists, factory-method is required

    <bean abstract="false" id="superfluousDefaultAttributeAbstract"/>

    <!-- Attribute abstract with default value 'false' is superfluous -->/
    <bean id="superfluousDefaultAttributeScope" scope="singleton"/>

    <!-- Attribute scope with default value 'singleton' is superfluous -->/
    <bean class="java.lang.StringBuilder">
      <property name="length">
         <bean id="beanId" // Attribute id is superfluous
              name="beanName"   // Attribute name is superfluous
              scope="prototype" // Attribute scope is superfluous
         />
      </property>
    </bean>
  </beans>