WIP: New Service: DESY indico

Draft for HIFIS Events Service, based on Indico, provided by DESY.

• Review here

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Approval needed (preliminary list):

• Complete Onboarding process
  • Complete corresponding questionnaire
  • Complete Service Canvas / directly put into cloud portal via MR (see below)
• Complete Follow-up process
• Provide proposal for Service description and Service Level Commitment in Portal - @jandt-desy
  • Review and correct when needed. Portal review app - Provider
• Check that user enrolment and AAI connectivity works as described
• Check that helpdesk response works - done multiple times in Zammad HIFIS Events Management queue
• ...
• Technically okay: @thomas.beermann
  --> Merge and publish.