start ns_stats_event earler
start ns_stats_event earler

So that ns_heart that does gen_event:call there doesn't get noproc
(via failover_safeness_level:get_value). That early call will fail
anyways due to failover_safeness_level not being installed, but that
error is handled and unknown is expectedly returned.

Change-Id: I5d34eab8b696f1a586aaa8d29d529bf9b7006810
Reviewed-on: http://review.couchbase.org/12903
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

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