Update vbucket functionality to latest build

- Remove code for the old 3.0.0-6xx builds which used 'nodes' for SSL
  information
- Remove old config samples from 6xx. Replace them with their 7xx
  equivalents.
- Fix buffer overflow

Change-Id: I8d98c53b0e806b08102c703524600762f3c8a749
Reviewed-on: http://review.couchbase.org/37860
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>