moved db_handler initialization into new file to be shared by any api.  Also corrected import * in tenant/resources.py
Merge pull request #49 from stevendgonzales/master

moved initialization of db_handler from tenant's app.py into datastor_init.py under the api directory to allow other api's that need a db_handler to simply import that method.  Also cleaned up "import * " from api.tenant.resources.py