Move all MongoDB-specific connection logic into driver layer, add createClient()
method to handle creating MongoClient
#13542
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Summary
Pulling in some work we started on with #4292 work (see vkarpov15/gh-4292 branch). One of the annoying pain points in building the in-memory driver was that we couldn't import Mongoose's
Connection
class without importing all of MongoDB. The driver layer is supposed to abstract that out, but connections have a bunch of MongoDB references that should really be in the driver layer.Examples