modules.py - what is the correct default?

[balmas]

the base persids-clients-app repo no longer includes ahab or joth, but the modules.py here still requires them.

not sure what the best way is to manage this -- the deployment scripts look at modules.py to decide whether or not to pull these repos in, but in a manual install if you don't want ahab or joth you have to go in and tweak this file.