made ns_config:get responsive by delegating it to replica process
made ns_config:get responsive by delegating it to replica process

Change-Id: I637a2af6831d7ba64fe6b788f827907b1ddda73b
Reviewed-on: http://review.northscale.com/2556
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

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