Create unit test file for datastore api
Add unit test class declaration and friend class it in DataStore
Update vcxproj files
Preparation for making unit test for DataStore and Transaction API
First test for Transaction's push method
Implement notify
Add default dtor
Include InternalDataStore into Operation interface
Implement run on all Operation classes
Add assert statement for unit test
Implement ctor for operation classes
Make all operation classes and interface dtor default
Modify test to be correct