Add AdjustedMatrix example to test_metadata script

https://code.usgs.gov/ghsc/geomag/geomag-algorithms/-/blob/master/test_metadata.py

create from test data in etc/adjusted

added In Progress label

changed title from Add an AdjustedMatrix example the test_metadata script to Add AdjustedMatrix example to test_metadata script

mentioned in merge request !74 (merged)

added In Review label and removed In Progress label

closed with merge request !74 (merged)

mentioned in commit f2bff535

removed In Review label