Add missing defer Close() calls in four locations:
- libpod/container.go: specFromState() opens the container config file
but never closes it after reading, leaking one fd per call.
- libpod/container_internal_common.go: checkpoint() and restore() each
open the bundle directory for CRIU statistics but never close it,
leaking one fd per checkpoint/restore operation.
- pkg/machine/shim/host.go: Init() opens the playbook file but never
closes it after ReadAll, leaking one fd per machine init.
Signed-off-by: Sebastien Tardif <sebtardif@ncf.ca>
846d1a1b05