In order to do more advanced spec generation with images, snapshots,
etc, we need to inject the context and client into the spec generation
code.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
- add `testutil.RequiresRoot()` to TestMain
- moved `if testing.Short{ t.Skip() }` from each of the tests into a
common `newClient()`
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>