increased ns_config:get_kv_list timeout. MB-4008
increased ns_config:get_kv_list timeout. MB-4008

Because 0.5 second is too small.

Change-Id: I87345ce9da172b0bfd3d4c15c9a2e1806ee4d699
Reviewed-on: http://review.couchbase.org/7567
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

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