Allow changing props for memcached buckets
Allow changing props for memcached buckets

Prevents changing the bucket type in case someone tries it from the
REST API.

Change-Id: I6f6685a17fd90e0b6c5e1bc04a017ab8f376e667
Reviewed-on: http://review.northscale.com/2453
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

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