rebase: update to latest snapshotter

this commit update the snapshotter client to v6.1.0

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/github.com/go-openapi/swag/file.go

@@ -0,0 +1,33 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package swag
+
+import "mime/multipart"
+
+// File represents an uploaded file.
+type File struct {
+	Data   multipart.File
+	Header *multipart.FileHeader
+}
+
+// Read bytes from the file
+func (f *File) Read(p []byte) (n int, err error) {
+	return f.Data.Read(p)
+}
+
+// Close the file
+func (f *File) Close() error {
+	return f.Data.Close()
+}