API level refactoring

Now we have 2 API - REST and DynamoDB.
But both of those 2 APIs are implemented in single WSGI application
Now it becomes to be a problem for future features implementation

This patch separates tese 2 API on paste configuration level

Change-Id: Icf4edc5647f3a0fa5b87b51b133939a77d35ff97
Merge "API level refactoring"