Docker plugin

[gomex]

Should be great create a plugin to check docker security host.

We can use this document as reference: https://docs.google.com/viewer?a=v&pid=forums&srcid=MTM5NjUxMzkxMTQ4MjY1MDUxOTYBMDc4NTQ0OTA3MTYwMzYyMjA3NDIBamRaRHBSelJodDRKATAuMQEBdjI