*Removed isAbstractStep() from BeanDefinitionUtils. The formulation "beanFactory.isTypeMatch(beanName, AbstractStep.class)" should be used instead because it will automatically check the resultant type of a FactoryBean as well.
*Changed *StepFactoryBean's getObjectType() to return TaskletStep.class, which is the most specific class name for the resulting object. This allows BeanFactory.isTypeMatch() to to recognize the factory bean's output properly.
*Renamed CoreNamespaceBeanDefinitionUtils to BeanDefinitionUtils since it is no longer specific to the core namespace.
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