message: Remove on_exit field in Manifest
diff: @@ -177,6 +177,7 @@ pub enum Output {
  }
  #[derive(Clone, Eq, PartialEq, Debug, Serialize, Deserialize)]
  +#[serde(deny_unknown_fields)]
  pub struct Manifest {
  /// Name of container
  pub name: Name,
  @@ -198,9 +199,6 @@ pub struct Manifest {
  /// Autostart this container upon northstar startup
  #[serde(skip_serializing_if = "Option::is_none")]
  pub autostart: Option<bool>,
  - /// Action on application exit
  - #[serde(skip_serializing_if = "Option::is_none")]
  - pub on_exit: Option<OnExit>,
  /// CGroup config
  #[serde(skip_serializing_if = "Option::is_none")]
  pub cgroups: Option<CGroups>,
  