Fixes K8sNetworkPlumbingWG package capitalization

Migrates package to use capitalized name, also cleans up dependencies.

Signed-off-by: Tim Rozet <trozet@redhat.com>

vendor/github.com/googleapis/gnostic/compiler/reader.go

@@ -15,6 +15,7 @@
 package compiler
 
 import (
+	"errors"
 	"fmt"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
@@ -53,11 +54,16 @@ func FetchFile(fileurl string) ([]byte, error) {
 		}
 		return bytes, nil
 	}
-	log.Printf("Fetching %s", fileurl)
+	if verboseReader {
+		log.Printf("Fetching %s", fileurl)
+	}
 	response, err := http.Get(fileurl)
 	if err != nil {
 		return nil, err
 	}
+	if response.StatusCode != 200 {
+		return nil, errors.New(fmt.Sprintf("Error downloading %s: %s", fileurl, response.Status))
+	}
 	defer response.Body.Close()
 	bytes, err = ioutil.ReadAll(response.Body)
 	if err == nil {
@@ -104,7 +110,9 @@ func ReadInfoFromBytes(filename string, bytes []byte) (interface{}, error) {
 	if err != nil {
 		return nil, err
 	}
-	infoCache[filename] = info
+	if len(filename) > 0 {
+		infoCache[filename] = info
+	}
 	return info, nil
 }