Ensure that each composite service's "Unloading" message is correct
Ensure that each composite service's "Unloading" message is correct

Given a composite `blah/composite` with component services `blah/foo`,
`blah/bar` and `blah/baz`, we were emitting the following messages
when unloading the service:

```
Unloading blah/composite
Unloading blah/composite
Unloading blah/composite
Unloading blah/composite
```

Now, we actually emit the proper identifier for each component service:

```
Unloading blah/foo
Unloading blah/bar
Unloading blah/baz
Unloading blah/composite
```

Signed-off-by: Christopher Maier <b4598f17a90ef80817bae8ad6c37249740caafb4@chef.io>

habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat