Add vm-nagios.json.
Merge branch 'nodes' into dev
Add base role for base cookbooks.

Base role includes:

- base
- interfaces, which configures the network settings if the hostname begins with "vm-".
- ssh_config
- kazu634

This commit refs #46.
Add the check task for role json file.

This commit refs and fixes #46.
Merge branch 'id/46' into dev