sudo right for hashar on lanthanum (Jenkins slave)

I could use some elevated privileges on the Jenkins slave box
lanthanum.eqiad.wmnet.  That is to be able to investigate weird issues
that will definitely happen on this box and easily run a puppet refresh
whenever needed.

The access request as been filled as RT #5677

Change-Id: I97ba56eebdbd0660505b329687bd3848ca5d5176