Copying im_resource_mgmt_user_absence to upgrade script, because it doesn't seem to be correct in cosine

  when cutting into a fraction of a day

  Now all users can see the report, but will only see "their" projects

  - Fixed issue with date when taking into account bank holidays
  - Now supporting the duration_days of bank holidays, allowing to
    specifiy a bank holiday of half a day, for example

  different months

  adding a report_cost_center_id field