Exit with error code if minio server fails to start (#1704)
Exit with error code if minio server fails to start (#1704)

This commit replaces the call to `errorIf` with `fatalIf`, so that the
minio server exits with an non-zero exit status if something fails, e.g.
the port was already openend by another process.
hackintoshrao/minio,harshavardhana/minio,rushenn/minio,dutchcoders/minio,fwessels/minio,brendanashworth/minio,koolhead17/minio,krishnasrinivas/minio,dutchcoders/minio,mf-00/newgo,harshavardhana/minio,dutchcoders/minio,mf-00/newgo,donatello/minio,brendanashworth/minio,dvstate/minio,dvstate/minio,luomeiqin/minio,luomeiqin/minio,luomeiqin/minio,mkash32/minio,fwessels/minio,rushenn/minio,alexellis/minio,minio/minio,NitishT/minio,donatello/minio,luomeiqin/minio,brendanashworth/minio,rushenn/minio,harshavardhana/minio,dvstate/minio,abperiasamy/minio,harshavardhana/minio,aead/minio,dutchcoders/minio,krishnasrinivas/minio,aead/minio,harshavardhana/minio,fwessels/minio,harshavardhana/minio,jimjag/minio,brendanashworth/minio,harshavardhana/minio,jimjag/minio,aead/minio,abperiasamy/minio,hackintoshrao/minio,abperiasamy/minio,aead/minio,krisis/minio,fwessels/minio,hackintoshrao/minio,NitishT/minio,krisis/minio,alexellis/minio,koolhead17/minio,balamurugana/minio,jimjag/minio,vadmeste/minio,jimjag/minio,aead/minio,mkash32/minio,NitishT/minio,rushenn/minio,hackintoshrao/minio,dvstate/minio,NitishT/minio,aead/minio,krishnasrinivas/minio-daily,krishnasrinivas/minio,aead/minio,abperiasamy/minio,krishnasrinivas/minio,minio/minio,aead/minio,balamurugana/minio,krishnasrinivas/minio-daily,harshavardhana/minio,vadmeste/minio