errorlib: use CERN's local email-to-SMS gateway
errorlib: use CERN's local email-to-SMS gateway

* Use CERN's local email-to-SMS gateway as per the forthcoming phase out
  of sms.switch.ch.

tiborsimko/invenio,tiborsimko/invenio,inveniosoftware/invenio,inveniosoftware/invenio