Pulled SysSpecs out of types.go and created two os specific implementations with build tags
Similarly created conditionally compiled implementations of KernelValidationHelper to get Kernel version in os specific manner, as well as os specific docker endpoints (socket vs named pipes)
This change allows validators to pass warnings as well as errors. This
was needed because of how support for docker 1.13+ and the new EE and CE
versions is currently being handled.
