Add non-root minio user.
Add non-root minio user.

This adds a minio user and runs minio as that user instead of
as root.

hackintoshrao/minio,hackintoshrao/minio,mkash32/minio,jimjag/minio,mkash32/minio,fwessels/minio,alexellis/minio,aead/minio,luomeiqin/minio,fwessels/minio,mf-00/newgo,balamurugana/minio,minio/minio,aead/minio,vadmeste/minio,donatello/minio,brendanashworth/minio,luomeiqin/minio,minio/minio,rushenn/minio,abperiasamy/minio,brendanashworth/minio,harshavardhana/minio,dvstate/minio,mf-00/newgo,harshavardhana/minio,jimjag/minio,dutchcoders/minio,dvstate/minio,dutchcoders/minio,dvstate/minio,brendanashworth/minio,luomeiqin/minio,koolhead17/minio,krishnasrinivas/minio-daily,krishnasrinivas/minio,abperiasamy/minio,hackintoshrao/minio,hackintoshrao/minio,donatello/minio,NitishT/minio,alexellis/minio,harshavardhana/minio,harshavardhana/minio,krishnasrinivas/minio,alexex/minio,krisis/minio,rushenn/minio,alexex/minio,dvstate/minio,luomeiqin/minio,krishnasrinivas/minio,NitishT/minio,harshavardhana/minio,fwessels/minio,NitishT/minio,rushenn/minio,aead/minio,brendanashworth/minio,harshavardhana/minio,abperiasamy/minio,alexex/minio,krishnasrinivas/minio,krishnasrinivas/minio-daily,harshavardhana/minio,aead/minio,NitishT/minio,balamurugana/minio,aead/minio,jimjag/minio,krisis/minio,dutchcoders/minio,vadmeste/minio,jimjag/minio,rushenn/minio,aead/minio,dutchcoders/minio,harshavardhana/minio,fwessels/minio,aead/minio,abperiasamy/minio,rajivm/minio,rajivm/minio,koolhead17/minio,aead/minio