Fix case change in ownernames (#16045)

If you change the case of a username the change needs to be propagated to their
repositories.

Signed-off-by: Andrew Thornton <art27@cantab.net>

models/repo.go

@@ -1350,6 +1350,26 @@ func UpdateRepository(repo *Repository, visibilityChanged bool) (err error) {
 	return sess.Commit()
 }
 
+// UpdateRepositoryOwnerNames updates repository owner_names (this should only be used when the ownerName has changed case)
+func UpdateRepositoryOwnerNames(ownerID int64, ownerName string) error {
+	if ownerID == 0 {
+		return nil
+	}
+	sess := x.NewSession()
+	defer sess.Close()
+	if err := sess.Begin(); err != nil {
+		return err
+	}
+
+	if _, err := sess.Where("owner_id = ?", ownerID).Cols("owner_name").Update(&Repository{
+		OwnerName: ownerName,
+	}); err != nil {
+		return err
+	}
+
+	return sess.Commit()
+}
+
 // UpdateRepositoryUpdatedTime updates a repository's updated time
 func UpdateRepositoryUpdatedTime(repoID int64, updateTime time.Time) error {
 	_, err := x.Exec("UPDATE repository SET updated_unix = ? WHERE id = ?", updateTime.Unix(), repoID)