pod: Rename doFetchPod
pod: Rename doFetchPod

doFetchPod() does not fetch anything from storage, but
creates a new Pod from scratch. newPod() seems more sensible
as a name.

Signed-off-by: Samuel Ortiz <0ba86cb3f08bbb861958e54bd3438887adb4263c@linux.intel.com>

containers/virtcontainers,containers/virtcontainers