CCBC-433 A new randomization algorithm.
CCBC-433 A new randomization algorithm.

Now using a Fisher–Yates shuffle to randomize the host list.

Change-Id: I03ccffdaedfcfe52f5fbddb367657fc8e0c76074
Reviewed-on: http://review.couchbase.org/37706
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>
Reviewed-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>

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