Added preliminary fix for Pharo event fetcher
Added preliminary fix for Pharo event fetcher

- until it is clear what the VM is supposed to do, we will make the
  image behave like all other images and set the EventTypeNone when no
  events are to be fetched

smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM,smarr/OmniVM