Updated the Spring framework version from 4.0.x to 3.2.x, due to the Spring JPA libraries, used in my services layer, needing the AopNamespaceUtils#registerAutoProxyCreatorIfNecessary(ParserContext, Object) method.  This method was removed in 4.0.x.  Also removed the configuration of the message converters tag within the annotation-driven tag, as it was not needed.