Add project lead and admins as admin on new slice (if not lead)
Add project lead and admins as admin on new slice (if not lead)

Fixes tkt 69

ahelsing/geni-ch,MarshallBrinn/geni-ch,ahelsing/geni-ch,MarshallBrinn/geni-ch,tcmitchell/geni-ch,tcmitchell/geni-ch