Hide given credentials for migrated repos. (#9097)

CloneAddr was being saved as OriginalURL.

Now passing OriginalURL through from the form and
saving it in it's place

routers/repo/repo.go

@@ -326,6 +326,7 @@ func MigratePost(ctx *context.Context, form auth.MigrateRepoForm) {
 	}
 
 	var opts = migrations.MigrateOptions{
+		OriginalURL:  form.CloneAddr,
 		CloneAddr:    remoteAddr,
 		RepoName:     form.RepoName,
 		Description:  form.Description,