spec-fedora: add env for default provider

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
spec: add env for default provider

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
Merge pull request #209 from miurahr/defalut_kvm_on_spec_fedora_vagrantfile

Defalut kvm on spec fedora vagrantfile