Implemented unit tests for storage classes and archive routes.

Disabled the tests for objectstore middle tier which will not be updated for a while, pending the middle tier interface review.
Remove the now useless (following the move to generic test) printouts of the type in backend store tests.
Added tests for RootEntry's admin hosts and admin users interface.

Added some templates for manipulating protocol buffers container. This reduces the boilerplate code significantly.

Created a richer protocol buffer RootEntry object and created a parital implementation to allow unit tests to run.

Added methods or storing deleteing and getting retrieval requests and their associated file transfers.

and their associated file transfers.

Created a richer protocol buffer RootEntry object and created a parital implementation to allow unit tests to run.

Commented out the queue related methods of SchedulerDatabase that should NOT be implemented until the re-design is finished!

Copied the implementation of the SqliteDatabase class to its new home, the  MockSchedulerDatabase class

The implementation is now good enough to run the unit tests (they do not pass yet).

Moved all of the classes in middletier/common to the scheduler directory because most of them are specific to the scheduler.  Please feel free to move those that are no so specific elsewhere.