mongodb configuration -- refactor

[jeremydouglass]

Mongodb config is for "localhost" and this appears throughout the code rather than in a configuration setting. In our container stack it needs to be "mongodb"

We should refactor the host setting to a configuration variable, and determine the easiest way to support both localhost anaconda development and docker deployment.

• https://github.com/washingtonpost/docker-mongodb

[jeremydouglass]

Migrated to: whatevery1says/we1s-wms#12