Refactored and improved code in OrderServiceImpl.saveOrder, OrderValidator and added more unit tests around validating orders - TRUNK-4217
Done some code clean up of unit tests to match @shoulds

Done some code clean up of unit tests to match @shoulds
TRUNK-4335 Validate liquibase against hbm

Removed unnecessary checksum
Revert "TRUNK-4335 Validate liquibase against hbm"

This reverts commit 69a0728d291c95926b8a69ac4dc617ed9ec0c04b.
Cleaned up and fixed failing liquibase changesets