XL/listObjects: Ignore entry if getObjectInfo() returns errFileNotFound (#2004)
XL/listObjects: Ignore entry if getObjectInfo() returns errFileNotFound (#2004)

Fixes #1956
hackintoshrao/minio,mf-00/newgo,brendanashworth/minio,abperiasamy/minio,krishnasrinivas/minio,NitishT/minio,aead/minio,jimjag/minio,aead/minio,vadmeste/minio,brendanashworth/minio,luomeiqin/minio,krishnasrinivas/minio-daily,balamurugana/minio,minio/minio,aead/minio,dvstate/minio,donatello/minio,hackintoshrao/minio,krisis/minio,jimjag/minio,luomeiqin/minio,alexellis/minio,abperiasamy/minio,dvstate/minio,jimjag/minio,krishnasrinivas/minio,dutchcoders/minio,krishnasrinivas/minio,rushenn/minio,abperiasamy/minio,dutchcoders/minio,NitishT/minio,rushenn/minio,abperiasamy/minio,dvstate/minio,rushenn/minio,balamurugana/minio,harshavardhana/minio,NitishT/minio,brendanashworth/minio,vadmeste/minio,fwessels/minio,koolhead17/minio,rushenn/minio,alexellis/minio,harshavardhana/minio,aead/minio,koolhead17/minio,aead/minio,aead/minio,hackintoshrao/minio,mf-00/newgo,krisis/minio,aead/minio,luomeiqin/minio,harshavardhana/minio,harshavardhana/minio,harshavardhana/minio,aead/minio,NitishT/minio,krishnasrinivas/minio,harshavardhana/minio,harshavardhana/minio,minio/minio,fwessels/minio,jimjag/minio,krishnasrinivas/minio-daily,harshavardhana/minio,dvstate/minio,luomeiqin/minio,dutchcoders/minio,fwessels/minio,dutchcoders/minio,donatello/minio,brendanashworth/minio,fwessels/minio,hackintoshrao/minio