Store Conmon's PID in our state and display in inspect

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

libpod/container_internal.go

@@ -452,6 +452,7 @@ func (c *Container) teardownStorage() error {
 // It does not save the results - assumes the database will do that for us
 func resetState(state *ContainerState) error {
 	state.PID = 0
+	state.ConmonPID = 0
 	state.Mountpoint = ""
 	state.Mounted = false
 	if state.State != define.ContainerStateExited {