The `ExecInspectResult` type was embedding `ExecInspect`, which is also
defined by the client, so there's no need to abstract it.
While updating, also;
- Rename `ExecID` to `ID`, to match the field-name returned by the API.
- Rename `Pid` to `PID`, to be in the right casing.
- Remove `json` labels, as option-types are not (un)marshaled to JSON.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
12123eb592