add the template file for generating the .rspec file. this was causing
"Could not find "rspec" in any of your source paths. Your current source
paths are: " [Fixes #3031]
Add request spec for backend new order process [Fixes #3022]

Fix order details and shipping method request specs

[Fixes #3000]
[Fixes #3032] When OrderInventory#verify is given a specific shipment, only remove variant from that shipment