Don't print error message if /opt/NorthScale doesn't exist
Don't print error message if /opt/NorthScale doesn't exist

Change-Id: Ic8e606b610a42ca3a82f0768417bc53b1f4b6356
Reviewed-on: http://review.northscale.com/2672
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

zbase/ep-engine,teligent-ru/ep-engine,teligent-ru/ep-engine,jimwwalker/ep-engine,couchbaselabs/ep-engine,sriganes/ep-engine,membase/ep-engine,daverigby/kv_engine,membase/ep-engine,sriganes/ep-engine,daverigby/ep-engine,couchbase/ep-engine,jimwwalker/ep-engine,owendCB/ep-engine,couchbaselabs/ep-engine,couchbase/ep-engine,jimwwalker/ep-engine,owendCB/ep-engine,hisundar/ep-engine,daverigby/kv_engine,membase/ep-engine,abhinavdangeti/ep-engine,zbase/ep-engine,abhinavdangeti/ep-engine,abhinavdangeti/ep-engine,couchbaselabs/ep-engine,teligent-ru/ep-engine,daverigby/ep-engine,jimwwalker/ep-engine,daverigby/kv_engine,teligent-ru/ep-engine,couchbase/ep-engine,hisundar/ep-engine,zbase/ep-engine,zbase/ep-engine,hisundar/ep-engine,hisundar/ep-engine,abhinavdangeti/ep-engine,membase/ep-engine,sriganes/ep-engine,couchbase/ep-engine,zbase/ep-engine,abhinavdangeti/ep-engine,daverigby/kv_engine,sriganes/ep-engine,couchbaselabs/ep-engine,daverigby/ep-engine,couchbaselabs/ep-engine,owendCB/ep-engine,daverigby/ep-engine,owendCB/ep-engine