Doesn't work with multiple DDP connections

[dandv]

See https://github.com/dburles/mongo-collection-instances/#multiple-connections

Perhaps join efforts with @dburles? More tests would be great :)

[Laboratory]

@dandv Thx for request.
I don't like use collection.get_name, I want use only constructor for creating collection instance.
I'll try add mote test and multiple connections.