Add ability to configure whether to deploy kpi-exporter

Also, add release name as a prefix to kpi-exporter resource names to
in line with other resources created by nem-monitoring.

Change-Id: I2b15f97128795e19d56a1be2a9290e8775f389e2
diff --git a/nem-monitoring/templates/exporter-deployment.yaml b/nem-monitoring/templates/exporter-deployment.yaml
index 1611239..f49029f 100644
--- a/nem-monitoring/templates/exporter-deployment.yaml
+++ b/nem-monitoring/templates/exporter-deployment.yaml
@@ -13,10 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+{{- if .Values.kpi_exporter.enabled }}
 apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
-  name: kpi-exporter
+  name: {{ template "kpi-exporter.fullname" . }}
   labels:
     release: {{ .Release.Name }}
 spec:
@@ -43,4 +44,5 @@
       volumes:
         - name: exporter-config
           configMap:
-            name: exporter-configmap
+            name: {{ template "kpi-exporter.fullname" . }}
+{{- end }}