[COOK-502] Implicity to_i openvpn/key/size to cater for the attribute being set as a string.
[COOK-4054] Only call use_inline_resources if it's available in openvpn conf provider.
Use short/implicit reference to default recipe in recipes option of attributes.
Add metadata.json to .gitignore.
Merge pull request #15 from flaccid/COOK-502

[COOK-502] Implicity to_i openvpn/key/size to cater for the attribute be...