Add ns_bucket:json_map_from_config
Add ns_bucket:json_map_from_config

This lets us get maps without calling to the config server.

Change-Id: I65e59154e2d4ef050295e009a7d43576c9493fad
Reviewed-on: http://review.northscale.com/2928
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

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