Add CDN exceptions

Signed-off-by: Toorop <toorop@toorop.fr>
Bug in getClient

Signed-off-by: Toorop <toorop@toorop.fr>
Add CdnDomainAlreadyConfiguredException

Signed-off-by: Toorop <toorop@toorop.fr>
Add CDN base calls

Signed-off-by: Toorop <toorop@toorop.fr>