Ensure MongoClient.connect closes connection if an error occurred #889
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Currently
MongoClient.connectprevents Node from exiting if an authorization failure occurs.It assumes that if
Db.connectreturned an error, that the database wasn’t open. But in fact,Db.connectcan return both and error and adbobject.So, in case of an error, check for a
dbobject, and if it exists, close the connection.