Added vinodkone to owners.json.
Added vinodkone to owners.json.

Would like to help landing Mesos changes into DCOS.
GoelDeepak/dcos,dcos/dcos,dcos/dcos,GoelDeepak/dcos,kensipe/dcos,kensipe/dcos,kensipe/dcos,GoelDeepak/dcos,GoelDeepak/dcos,dcos/dcos,dcos/dcos,dcos/dcos,kensipe/dcos