Implement testing / the Firebase dilemma

[michaelyfan]

The app is currently connected to two Firebase apps at once. This is something that our Angular/Firebase dependency, AngularFire, doesn't really have a standardized/"official" way to do, so I've been using the community-suggested workaround here: angular/angularfire#1026 (comment)

But it causes some errors with testing, as well as some more high-level worries, see here: angular/angularfire#2555

It * works * but may not be sustainable, since the solution smells janky. Will try to get AngularFire's attention first

[michaelyfan]

Potential solutions:

angular/angularfire#1240 (comment)
Though it seems this doesn't work according to comments

https://stackoverflow.com/questions/50473945/angular2firebase-multiple-instances-using-angular-6/50476192#50476192
This might be bingo
"James Daniels" is the dude who regularly contributes to angularfire

[michaelyfan]

May be resolved by #23