Not working with K8s 1.8

When running `krm` under 1.8, it throws an error. Investigate.

```bash
$ kubectl version --short
Client Version: v1.9.2
Server Version: v1.8.0

$ krm expand test/ghost-helm.yaml | kubectl apply -f - --namespace paramdemo
INFO[0000] Parsed a Parameterizer resource from test/ghost-helm.yaml with following content:
Parameterizer {
name: basic
resources:
user inputs:
volumes:
apply:
- :
with image [] executing commands:
}

Using manifest:
apiVersion: batch/v1
kind: Job
metadata:
creationTimestamp: null
name: krm-exec-basic-6f40297a
spec:
template:
metadata:
creationTimestamp: null
spec:
containers:
- command:
- echo
- helm-prom-operator
image: alpine:3.7
name: krm-result
resources: {}
initContainers:
- command:
- sh
- -c
- helm fetch --untar --untardir ./stable stable/ghost > /dev/null 2> /dev/null
&& helm template stable/ghost -n g1
image: quay.io/wire/alpine-helm
name: helm-prom-operator
resources: {}
restartPolicy: Never
status: {}

Executing command: create -f /tmp/krm371254186
job "krm-exec-basic-6f40297a" created
Waiting for Job krm-exec-basic-6f40297a to complete....krm-exec-basic-6f40297a-r4djs krm-exec-basic-6f40297a-xgpw6
Error from server (NotFound): pods "krm-exec-basic-6f40297a-r4djs krm-exec-basic-6f40297a-xgpw6" not found
ERRO[0014] exit status 1
error: no objects passed to apply
```