Change name of several tests for Fixture class to better reflect their purpose after the refactoring of Fixture for multiple Data Sets.
Remove unrequired dsData property from Fixture class
Refactor unit tests for Fixture class, and implement test for multiple Data Sets
Resolve issue with incorrect class used in FixtureDataSetTest
Ensure that a transaction is in place before using fixture data
Add documentation for fixtures
Resolve issue with Fixture datasets when loaded from Temp-Tables where data would be loaded twice.