Add gitlab-shell to error message to give user a clue that something may be wrong there.
Ran into this in #2082. User was told that repositories were created when they were
not due to hooks symlink being wrong.
Remove overload of BaseService.initialize, so initialize gains params,
which is used to pass the namespace (like e.g. in TransferService).
The namespace is checked for permission to create projects in it.
Stan Hu
Douwe Maan
Valery Sizov
Jeroen van Baarsen
Bernhard Kaindl
Dmitriy Zaporozhets