DATACMNS-352 - Aligned setter names for argument resolvers for Pageable and Sort.

PageableHandlerMethodArgumentResolver and SortHandlerMethodArgumentResolver now consistently use set*ParameterName(…) and setQualifierDelimiter(…) for configuration.

Added some more unit tests to verify invalid configuration get rejected.
DATACMNS-314 - Polished indentation in pom.xml.
DATACMNS-304 - JavaDoc fix for PageableArgumentResolver.

The deprecation hint in PageableArgumentResolver now points to PageableHandlerMethodArgumentResolver.