#25 Raise exception when add domain to principal2

[maxi]

The method addDomainsAndPermissions raise exception
because always assign the domains to principal. For
example I have an empty domain list for a principal
then I assign the first domain all goes fine, but when
I assign the second domain, the function
addDomainsAndPermissions iterates over all domain list
and try to create all again. The same problem happens
when I try to revoke a domain, this function iterates
on the remaining domains and try to create the
remainings domains again, in this case must delete the
revoked domain.

Cheers
Maxi