Fix git user config in arthel repo on hunter

[magent-cryptograss]

Problem

The arthel repository on hunter has git config set to Justin's identity instead of magent's:

$ git config user.name
Justin Holmes

$ git config user.email  
justin@justinholmes.com

Meanwhile, maybelle-config is correctly configured as magent-cryptograss. This causes commits made by magent in arthel to appear under Justin's authorship.

Expected Behavior

arthel should have the same git config as maybelle-config:

• user.name: magent-cryptograss
• user.email: magent@cryptograss.live

Likely Cause

Probably something in the hunter container build logic or initialization scripts is setting this incorrectly for arthel.

Fix

Need to either:

1. Fix the hunter build logic to set correct git config for all repos
2. Run git config user.name 'magent-cryptograss' && git config user.email 'magent@cryptograss.live' in arthel repo on hunter