add back in tests on latest go, but allow it to fail.
add back in tests on latest go, but allow it to fail.

this is an important early warning sign, and I think it's good to add it back in
in a way that doesn't cause the build to fail.

timsutton/packer,paulmey/packer,youhong316/packer,dave2/packer,pecigonzalo/packer,mitchellh/packer,mkuzmin/packer,grubernaut/packer,pecigonzalo/packer,bryson/packer,ricardclau/packer,rnaveiras/packer,KohlsTechnology/packer,tb3088/packer,paulmey/packer,tas50/packer,youhong316/packer,dave2/packer,ricardclau/packer,KohlsTechnology/packer,rnaveiras/packer,tb3088/packer,mkuzmin/packer,timsutton/packer,tb3088/packer,timsutton/packer,mkuzmin/packer,grubernaut/packer,tas50/packer,KohlsTechnology/packer,youhong316/packer,youhong316/packer,hashicorp/packer,rnaveiras/packer,timsutton/packer,pecigonzalo/packer,paulmey/packer,mkuzmin/packer,hashicorp/packer,tb3088/packer,grubernaut/packer,ricardclau/packer,KohlsTechnology/packer,bryson/packer,pecigonzalo/packer,bryson/packer,mkuzmin/packer,youhong316/packer,mkuzmin/packer,tas50/packer,ricardclau/packer,mitchellh/packer,timsutton/packer,paulmey/packer,mitchellh/packer,dave2/packer,KohlsTechnology/packer,tas50/packer,timsutton/packer,bryson/packer,hashicorp/packer,tb3088/packer,paulmey/packer,ricardclau/packer,rnaveiras/packer,dave2/packer,dave2/packer,tb3088/packer,mitchellh/packer,grubernaut/packer,tas50/packer,grubernaut/packer,bryson/packer,rnaveiras/packer,ricardclau/packer,rnaveiras/packer,bryson/packer,KohlsTechnology/packer,grubernaut/packer,dave2/packer,mitchellh/packer,hashicorp/packer,paulmey/packer,youhong316/packer,tas50/packer