Custom GA workflow

[jamesvanmil]

Closes #1767

Introduces a work-wise workflow for managing the collection of GA stats

[coveralls]

Coverage decreased (-0.4%) to 95.869% when pulling 0618cf5 on maint/1767-ga into 1c59a0a on develop.

[crowesn]

👍 I think this looks sound - do (or can) we test this on QA?

[hortongn]

@jamesvanmil I'm giving this a 👍and will merge in the morning. It's a great approach to fixing really broken code.

I do have some suggestions to keep mind when doing future issues or if we ever swing back around and refactor this code, but it's not worth blocking a merge right now.

The WorkAndFileIndex class should be refactored. If you have "and" in your class name, IMO that's a code smell that it should be split up into two separate classes (e.g. WorkIndex and FileIndex) or better yet, generalized into something like ObjectsIndex to handle works or files without using a bunch of duplicated methods. WorkIndex and FileIndex could inherit from ObjectsIndex if needed.

The rescue lines in CustomStatImporter are not well tested. I think you mentioned that.

[jamesvanmil]

👍