Improve code styles and fix after Harbor refactoring

Signed-off-by: 陈德 <chende@caicloud.io>

docs/swagger.yaml

@@ -1139,7 +1139,7 @@ paths:
       parameters:
         - name: request
           in: body
-          description: reqeust to given source image and target tag
+          description: Request to give source image and target tag.
           required: true
           schema:
             $ref: '#/definitions/RetagReq'
@@ -1149,7 +1149,7 @@ paths:
         '200':
           description: Image retag successfully.
         '400':
-          description: Invalid image values provided
+          description: Invalid image values provided.
         '401':
           description: User has no permission to the source project or destination project.
         '404':

src/common/models/retag.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+// Copyright Project Harbor Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -38,7 +38,7 @@ type Image struct {
 func ParseImage(image string) (*Image, error) {
 	repo := strings.SplitN(image, "/", 2)
 	if len(repo) < 2 {
-		return nil, fmt.Errorf("unable to parse image from string: %s", image)
+		return nil, fmt.Errorf("Unable to parse image from string: %s", image)
 	}
 	i := strings.SplitN(repo[1], ":", 2)
 	res := &Image{

src/common/models/retag_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+// Copyright Project Harbor Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -68,7 +68,7 @@ func TestParseImage(t *testing.T) {
 			}
 		} else {
 			if err != nil {
-				t.Errorf("expect to parse %s fail, but not", c.Input)
+				t.Errorf("failed to parse image %s", c.Input)
 			}
 		}
 	}

src/common/utils/registry/auth/tokenauthorizer.go

@@ -257,7 +257,7 @@ func ping(client *http.Client, endpoint string) (string, string, error) {
 		}
 	}
 
-	log.Warningf("schemas %v are unsupported", challenges)
+	log.Warningf("Schemas %v are unsupported", challenges)
 	return "", "", nil
 }
 

src/core/api/repository.go

@@ -491,7 +491,7 @@ func (ra *RepositoryAPI) Retag() {
 	}
 
 	// Retag the image
-	if err = uiutils.Retag(srcImage, &models.Image{
+	if err = coreutils.Retag(srcImage, &models.Image{
 		Project: project,
 		Repo:    repo,
 		Tag:     request.Tag,

src/core/utils/retag.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+// Copyright Project Harbor Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.