Update minio (#12979)

* update minio docker image to latest stable available on 31/10/2019

* update minio-go dependencies

go.mod

@@ -50,7 +50,7 @@ require (
 	github.com/mattn/go-runewidth v0.0.4 // indirect
 	github.com/mattn/go-sqlite3 v1.11.0
 	github.com/miekg/dns v1.1.19 // indirect
-	github.com/minio/minio-go/v6 v6.0.38
+	github.com/minio/minio-go/v6 v6.0.40
 	github.com/mitchellh/go-testing-interface v1.0.0 // indirect
 	github.com/muesli/smartcrop v0.3.0 // indirect
 	github.com/olekukonko/tablewriter v0.0.1 // indirect