qa/admin/pcp-daily: add vm15 to the set of VMs to keep running
qa/admin/pcp-daily: add vm15 to the set of VMs to keep running

Having trouble rebooting this VM!

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp