slapos.core: rerelease 1.6.15 to update changelog

6 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed SlapOS-Master.UnitTest-Master

01:04:41

failed SlapOS.Eggs.UnitTest-Master.Python2

failed SlapOS.Eggs.UnitTest-Master.Python3

00:09:23

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

failed SlapOS.Eggs.UnitTest-Master.Python2

00:13:59