Do not rely on Data::Dumper to produce rolled out hashrefs
Remove test cruft forgotten after 52864fbd
Clarify result_class tweaking on active/cached cursors

We need this to simplify logic of result_class type caching
Scale back validation of the 'as' attribute (revert 95e41036)

It turned out that users employ invalid-but-sensical inflation maps in
production. Remove the early sanity check of the infmap and move the code
throwing an exception all the way back to ::Row

Follow through this thread for more details:
http://lists.scsys.co.uk/pipermail/dbix-class/2013-February/011115.html