OR-699 Get CalDAV server configuration with esn-config
OR-699 Add unit tests
OR-699 Add new core module `caldav` in module manager unit test
Merge pull request #532 in OR/rse from ~RPIGNOLET/rse:OR-699 to master

* commit '8a018a357ac622ffa4288c263bc10926865aa2a4':
  OR-699 Add new core module `caldav` in module manager unit test
  OR-699 Add unit tests
  OR-699 Get CalDAV server configuration with esn-config