* Add migration to sanitize repository original_url
During a large code move in #6200 the OriginalURL field was
accidentially changed to be populated with the CloneAddr field which
will contain the username and/or password provided during a migration.
This behavior was fixed in previous PR #9097 and this migration will
remove any authentication details that were stored in the database
between those two.
* use net/url to rebuild URL instead of strings.Replace
* Update models/migrations/migrations.go
* changes per lunny
* make fmt
