Add .rspec with `--require spec_helper`
Add .rspec with `--require spec_helper`

`chef exec delivery local unit` will fail with undefined method errors for ChefSpec
matchers if we don't ensure that we load spec_helper and consequently chefspec first.

Signed-off-by: Bryan McLellan <9da9e2973b9c72b95f1bc7169993146760fceeb1@loftninjas.org>

opscode-cookbooks/powershell,chef-cookbooks/powershell