FIX: Make sure configurations are synced between packages

[greglucas]

Change Summary

Overview

This moves all the data configuration handling to the imap_data_access package.

An alternative would be to share the configuration dictionary between the packages by doing something like:
from imap_data_access import config in imap_processing.__init__.py but that seems like too much sharing at that point and we should really keep the configuration dictionaries separate and modify the proper ones where appropriate. This means that I removed the configuration dictionary from imap_processing now since it only had data storage methods in it.

I'm not sure if we can cross-repo close issues, but worth a shot.
closes IMAP-Science-Operations-Center/imap-data-access#15

Deleted Files

• test_data_access
  • This is handled in the other repository and that is there already. Not sure there is a great way to test this here?

Updated Files

• Updates to the global test fixture to set the imap_data_access utilities to a temporary directory.
• Updates to use imap_data_access.config instead of imap_processing.config

[bourque]

LGTM

Perhaps for a different PR, but we should also remove the INSTRUMETNS and PROCESSING_LEVELS in the __init__.py file and import those from imap_data_access as well.

[maxinelasp]

Nice, this looks good. Hopefully this fixes the weird conflicts!