INT-2531: Remove deprecations in XML Adapter after upgrade to Spring 3.1.1

* BeanDefinitionParserDelegate constructor now prefers an Environment. Circumvent this
preference by directly getting BeanDefinitionParserDelegate from the associated ParserContext
Merge pull request #759 from sobychacko/INT-2531

* sobychacko-INT-2531:
  INT-2531: Remove deprecations in XML Adapter after upgrade to Spring 3.1.1