SS-665 Added a simple spec for data serializer.

This reproduces a problem where the Serializes strips off UTF-8
characters during #dump.
SS-665 switch from debugger to pry
SS-665 translate new serializer test case into Gherkin
SS-665 fix serializer issue (don’t tamper with valid UTF-8)
SS-665 version bump to 2.8.32
Merge pull request #141 from rightscale/sapphire_14_18_ss_665_serialize_utf8

Fix overly aggressive UTF-8 string validation