OSH-Infra: Add emptydirs for tmp

This PS adds emptydirs backing the /tmp directory in pods, which
is required in most cases for full operation when using a read only
filesystem backing the container.

Additionally some yaml indent issues are resolved.

Change-Id: I8b7f1614da059783254aa6efc09facf23fca3cad
Signed-off-by: Pete Birley <pete@port.direct>

elastic-packetbeat/templates/daemonset.yaml

@@ -134,12 +134,16 @@ spec:
                 fieldRef:
                   fieldPath: spec.nodeName
           volumeMounts:
+            - name: pod-tmp
+              mountPath: /tmp
             - name: packetbeat-etc
               mountPath: /etc/packetbeat/packetbeat.yml
               subPath: packetbeat.yml
               readOnly: true
 {{ if $mounts_packetbeat.volumeMounts }}{{ toYaml $mounts_packetbeat.volumeMounts | indent 12 }}{{ end }}
       volumes:
+        - name: pod-tmp
+          emptyDir: {}
         - name: packetbeat-etc
           configMap:
             defaultMode: 0444