SimpleMetadataReaderFactory is capable of resolving inner class names with dot syntax now (analogous to ClassUtils.forName)

Issue: SPR-12390
Configuration class parsing reuses metadata from AnnotatedBeanDefinition as far as possible

Issue: SPR-12394
Fix test issue with Set iteration order
Revised SingleConnectionFactory for individual proxies with ExceptionListener and start/stop state

Issue: SPR-10397
Polishing
Update log settings for spring-websocket tests
Fix Javadoc in MockHttpServletRequestBuilder

Class-level Javadoc for MockHttpServletRequestBuilder now correctly
refers to MockMvcRequestBuilders instead of MockMvcBuilders.

Issue: SPR-12393