Use mockery for 'axiom-base' if 'testing' in 'axiom.env', working on output
Expect axiom config values to be in 'axiom' namespace
Load config file based on 'axiom.config' env variable
Use only positional arguments for 'moduleName', 'serviceName'
Require 'qi' for tests
Existing test now invalid
Modify listen to accept 'topic', standard-format callback