Nucivic nucivic internal issue 43 move read apis odsm

Nucivic/nucivic-internal#43

### Acceptance test
* drush pm-disable dkan_dataset_api
* drush pm-enable open_data_schema_map open_data_schema_map_dkan
* drush fr open_data_schema_map_dkan
* drush cc all
* Endpoints should behave as it did with dkan_dataset_api