Support varargs for DomUtils.getChildElementsByTagName

Issue: SPR-11272
(cherry picked from commit e334489)
Avoid hard reference to LocalValidatorFactoryBean in <mvc:annotation-driven> parser

Issue: SPR-11272
(cherry picked from commit c48da0d)
Introduced "spring.beaninfo.ignore" system property for optimized Introspector usage

Issue: SPR-9014
(cherry picked from commit f88cbda)