itsm namespace in extension registration

[Yves Savourel <ysavourel@enlaso.com>]

Hi,

While the ITSM module of 2.1 would be understood as a module by 2.1 processors, there is nothing that prevent its use in a 2.0 file
as well. In that case it would be seen as a non-supported module by most 2.0 processors.

So, should we register itsm in the extension registry?

Cheers,
-yves