Move all global env access to the config module.

[dmlb2000]

Description

This moves all the getenv references in globals.py to config options in config.py. This allows all the configuration of cart to be set in the config file entirely.

Signed-off-by: David Brown dmlb2000@gmail.com

Issues Resolved

fix #39

Check List

• [ ] All tests pass. See https://github.com/pacifica/pacifica-docs/blob/master/development/TESTING.md
• [ ] New functionality includes testing.
• [ ] New functionality has been documented in the README if applicable