Measured BW Authority will not work on private networks with less than 3 scanners

Since Measured BW votes are only used for consensus if there are at least 3 of them, this scheme will never work on a private tor network with less than 3 auth dirs. I wonder if it would make sense to reduce this check to only one valid vote to be necessary if TestingTorNetwork is set.

[Automatically added by flyspray2trac: Operating System: All]

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Username: fabi