bug 1339 - default data dir needs an ensure_dir().
bug 1339 - default data dir needs an ensure_dir().

Change-Id: I11a854fb3d83822dc71e0af8502e26123554f4aa
Reviewed-on: http://review.northscale.com:8080/519
Reviewed-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>
Tested-by: Sean Lynch <9c3328a4a1f4f8f5c18b2d5b9057163c49b93ff3@literati.org>

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