Share log attr between cli classes

[evrose54]

Reviewer Checklist

• Required existing tests pass (ie full_test.sh, others as appropriate)
• NO REQUIRED unit tests (explain why not required)
• NO REQUIRED integration tests (explain why not required)
• Required documentation added for new/modified functionality
• Required release notes added for new/modified functionality
• NO REQUIRED updates to other repos (explain why not required)

Related Issues

fixes #714

Testing Instructions

pytest -v /tests/unit_tests/commandline/.

Summary

Since we've started developing the GeoIPS CLI, we've known that there was a need to
have a shared logger object among all of the CLI command classes for debugging
purposes and to output basic information to the user if requested. We can now do
this using the '--log-level' / '-log' flag. Depending on the log level set, all
levels that match or are of higher 'order' than the log level provided will be
outputted. This functionality matches that used in 'run_procflow'. Logging is now
a supported utility throughout the CLI, and can be used in any CLI class via
self.LOG.<log_level>(log_statement).

Output

I didn't add any permanent logging statements but we can add some if wanted. I did test the new functionality and it works as expected!

[jsolbrig]

I think this line should be reverted to the previous order.

[evrose54]

It seems interactive is set to level 35. Debug is 10, info is 20, warning is 30, error is 40, critical is 50. So the list should actually be in the order of [debug, info, warning, interactive, error, critical].

[evrose54]

This has since been addressed.