VSE: Upload modules (a model file) to a (new) dataspace

VSE: Upload modules (a model file) to a (new) dataspace

1. Schema.sql modified to include modules and json_data tables which can be removed after the PoC
2. URI changed as per the proposal to '/dataspaces/{dataspace_name}/modules'
3. Dataspace name corresponding to a model is passed as a parameter.
4. In case the dataspace doesnt exist in the dataspace table, a new entry for the passed dataspace is created.
5. The corresponding dataspace_id is also stored as  a reference in the modules table.
6. Test case for Rest API will be pushed as another review.

JIRA: https://jira.onap.org/browse/CCSDK-2897

Issue-ID: CCSDK-2897
Change-Id: Ic9caa39b5a7afca28c0365cdb4f492848d0ead3e
Signed-off-by: puthuparambil.aditya <aditya.puthuparambil@bell.ca>