tests: Add a unit test version.go
tests: Add a unit test version.go

Unit test coverage for version.go is now 100%.

Fixes #273.

Signed-off-by: James O. D. Hunt <348fbaadfbada55ea105602bf5609e23ac1c4898@intel.com>

clearcontainers/runtime,chavafg/runtime,devimc/runtime,clearcontainers/runtime,devimc/runtime,chavafg/runtime