Bug 1849: Process heartbeats before replying to status request
Bug 1849: Process heartbeats before replying to status request

This makes it so that if the doctor doesn't get scheduled for a while
and there's a request for status in the queue, we don't show all the
nodes as stale.

Change-Id: Ia1279956397e22e4b2ce0470387ff7156cc750e2
Reviewed-on: http://review.northscale.com/2520
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

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