Fix: health check attributes `path` and `timeout_seconds` stored properly in Marathon but not respected in the provider
Fix: health check attributes `path` and `timeout_seconds` stored properly in Marathon but not respected in the provider

 With health check defined as COMMAND:
 ```
    health_checks {
        health_check {
            protocol = "COMMAND"
            command = {
                value = "sleep 1"
            }
            grace_period_seconds = 5
            interval_seconds = 15
            max_consecutive_failures = 2
            timeout_seconds = 5
        }
    }

 The current value of `path` and `timeout_seconds` were not respected, even though they were stored properly in Marathon:
```
~ marathon_app.some_application
    health_checks.0.health_check.0.path:            "" => "/"
    health_checks.0.health_check.0.timeout_seconds: "20" => "5"
```

nicgrayson/terraform-provider-marathon,nicgrayson/terraform-provider-marathon