Reduced default vbuckets to 256
Reduced default vbuckets to 256

Change-Id: I9e9bb2ec0264d9bf06dd266608de5e648e399344
Reviewed-on: http://review.couchbase.org/8045
Tested-by: Sharon Barr <6f5cbf38bc3c26768d1dc5da105c245aae66146e@gmail.com>
Reviewed-by: Sharon Barr <6f5cbf38bc3c26768d1dc5da105c245aae66146e@gmail.com>

mschoch/ns_server,mschoch/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,membase/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,ceejatec/ns_server,mschoch/ns_server,membase/ns_server,ceejatec/ns_server,nimishzynga/ns_server,mschoch/ns_server,membase/ns_server,membase/ns_server,daverigby/ns_server,mschoch/ns_server,daverigby/ns_server,nimishzynga/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,mschoch/ns_server,vzasade/ns_server,membase/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,nimishzynga/ns_server,membase/ns_server,daverigby/ns_server,daverigby/ns_server