Dev/mip 106 remove the metadata from the codebase
Created by: ThanKarab
Changelog:
- Removed the CDEsMetadata from the engine's codebase. Jira
- Added one common_data_elements module per controller/node service so that each one loads from it's own config.
- The filters module methods now use common_data_elements as parameter to remove dependency from the common_data_elements module. Fixed the tests of filters to use mock_cdes, no dependency from the cdes module.
- Minor fixes on the tests to remove race conditions.