In prepration for actual usage of the tool, don't allow the authnet code to fall back to the test account ID for processing payments
Make sure before attmepting to process a `Payment`, that the `ConferenceCostsEntity` has the appropriate authnet information.
Removing redundant code at @hlbraddock's request
Merge pull request #167 from CruGlobal/disable-authnet-fallback

Disable authnet fallback