Clean up Data Mapper test case
The tests in the data mapper cover too many methods at once - basically it's functional tests for the whole class (and some others) by calling the map() method.
Please split up the tests so they only focus on one method at once and mock the others (ie. work with a mocked DataMapper in the first place).
- FLOW3: (Object) In the Object Builder renamed createSkeleton() to createEmptyObject and all *SetterProperties() method to *Propertiers().
- FLOW3: (Object) Moved the thawProperties() method to the TYPO3CR package
- TYPO3CR: Cleaned up (a bit) the Data Mapper test case. Needs more work! Refs #2623