Split Example and ExampleSpec to create reusable components. Refactor builder pattern to a fluent API that creates immutable instances. Split user and framework API, Example and ExampleSpec are user API, created ExampleSpecAccessor for modules to access example spec configuration. Create static methods in GenericPropertyMatchers to ease creation of matchers in a readable style. Convert PropertySpecifier to inner class and move PropertySpecifiers to ExampleSpec.
Related tickets: DATAJPA-218, DATAMONGO-1245.
Original pull request: #153.
b0ce7009e8