install swagger from source

First of all this removes the need for a network connection, second
renovate can update the version as it is tracked in go.mod.

However the real important part is that the binary downloads are
broken[1]. For some reason the swagger created with them does not
include all the type information for the examples. However when building
from source the same thing works fine.

[1] https://github.com/go-swagger/go-swagger/issues/2842

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

test/tools/vendor/github.com/go-openapi/runtime/csv.go

@@ -0,0 +1,77 @@
+// 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 runtime
+
+import (
+	"bytes"
+	"encoding/csv"
+	"errors"
+	"io"
+)
+
+// CSVConsumer creates a new CSV consumer
+func CSVConsumer() Consumer {
+	return ConsumerFunc(func(reader io.Reader, data interface{}) error {
+		if reader == nil {
+			return errors.New("CSVConsumer requires a reader")
+		}
+
+		csvReader := csv.NewReader(reader)
+		writer, ok := data.(io.Writer)
+		if !ok {
+			return errors.New("data type must be io.Writer")
+		}
+		csvWriter := csv.NewWriter(writer)
+		records, err := csvReader.ReadAll()
+		if err != nil {
+			return err
+		}
+		for _, r := range records {
+			if err := csvWriter.Write(r); err != nil {
+				return err
+			}
+		}
+		csvWriter.Flush()
+		return nil
+	})
+}
+
+// CSVProducer creates a new CSV producer
+func CSVProducer() Producer {
+	return ProducerFunc(func(writer io.Writer, data interface{}) error {
+		if writer == nil {
+			return errors.New("CSVProducer requires a writer")
+		}
+
+		dataBytes, ok := data.([]byte)
+		if !ok {
+			return errors.New("data type must be byte array")
+		}
+
+		csvReader := csv.NewReader(bytes.NewBuffer(dataBytes))
+		records, err := csvReader.ReadAll()
+		if err != nil {
+			return err
+		}
+		csvWriter := csv.NewWriter(writer)
+		for _, r := range records {
+			if err := csvWriter.Write(r); err != nil {
+				return err
+			}
+		}
+		csvWriter.Flush()
+		return nil
+	})
+}