Implement Holidays Acquisition

See merge request !1877
5 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

00:44:12

failed ERP5.UnitTest-Master

01:22:10

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:31

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:28

passed Wendelin.UnitTest-Master

00:33:00