fix(sdam): topology no longer causes close event #2791
Merged
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The topology was emitting both a "topologyClosed" and "close"
event which are bubbled up to the MongoClient. This was causing
two "close" events to be emitted from the MongoClient when the
client is closed.
NODE-3219
There was one test on this branch looking for that event that was
looking for that event and not "topologyClosed", so I'm wondering
if this should not be backported.