removed F from HDZF in tests, and else where for sensor orientation

geomagio/api/ws/Observatory.py

test/ObservatoryMetadata_test.py

test/api_test/ws_test/observatories_test.py

test/api_test/ws_test/variometers_test.py

test/iaga2002_test/IAGA2002Parser_test.py

test/imfjson_test/IMFJSONWriter_test.py