Adding a few changes to FDSNFActory regarding the FDSNNoDataException. I also...

Added changes to the FDSNFactory regarding the FDSNNoDataException. I also created a private function to contain the logic that removes sensitivity/response info for traces. The channel rotations were implemented after the changes to trace.stats.response were made. I added all available stations that transmit geomagnetic data for networks, IU, N4, and US to the VariometerMetadata.py module.

test/api_test/ws_test/data_test.py

@@ -10,7 +10,6 @@ from geomagio.api.ws.DataApiQuery import (
     DataApiQuery,
     OutputFormat,
     SamplingPeriod,
-    FilterDataApiQuery,
 )