Feature/issue 13 - Add SWORD version from shp.xml

[torimcd]

Github Issue: #13

Description

Add the SWORD version number to each database record

Overview of work done

Added new parse_metadata_from_shpxml function to swot_reach_node_shp io handler to read metadata from the *.shp.xml files.

Overview of verification done

Updated test_query unit test to explicitly check new sword_version value is present and correct. Added sword_version field to test values in constants file to ensure it is covered in both the read_shapefile tests and the test_hydrocron_database tests (ie test that it is read correctly from the file, and that it is loaded correctly into the db). All unit tests pass.

Overview of integration done

Deployed to SIT and verified newly loaded granules have new sword_version attribute with correct values.

PR checklist:

• Linted
• Updated unit tests
• Updated changelog
• Integration testing

See Pull Request Review Checklist for pointers on reviewing this pull request

[nikki-t]

Modifications look good to me. I will need to update the timeseries API endpoint to return the SWORD version. Should we always return the SWORD version in the response or should we make it an optional field?