Add Helm tester deployment spec

To be deployed in kube-system namespace, uses tiller service account

artifacts/helmtester/deployment.yaml

@@ -0,0 +1,57 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: flagger-helmtester
+  labels:
+    app: flagger-helmtester
+spec:
+  selector:
+    matchLabels:
+      app: flagger-helmtester
+  template:
+    metadata:
+      labels:
+        app: flagger-helmtester
+      annotations:
+        prometheus.io/scrape: "true"
+    spec:
+      serviceAccountName: tiller
+      containers:
+        - name: helmtester
+          image: weaveworks/flagger-loadtester:0.4.0-beta.2
+          imagePullPolicy: IfNotPresent
+          ports:
+            - name: http
+              containerPort: 8080
+          command:
+            - ./loadtester
+            - -port=8080
+            - -log-level=info
+            - -timeout=1h
+          livenessProbe:
+            exec:
+              command:
+                - wget
+                - --quiet
+                - --tries=1
+                - --timeout=4
+                - --spider
+                - http://localhost:8080/healthz
+            timeoutSeconds: 5
+          readinessProbe:
+            exec:
+              command:
+                - wget
+                - --quiet
+                - --tries=1
+                - --timeout=4
+                - --spider
+                - http://localhost:8080/healthz
+            timeoutSeconds: 5
+          resources:
+            limits:
+              memory: "512Mi"
+              cpu: "1000m"
+            requests:
+              memory: "32Mi"
+              cpu: "10m"

artifacts/helmtester/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: flagger-helmtester
+  labels:
+    app: flagger-helmtester
+spec:
+  type: ClusterIP
+  selector:
+    app: flagger-helmtester
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: http