[stable/influxdb] update to support k8s v1.16 (#18240)

stable/influxdb/Chart.yaml

 apiVersion: v1
 name: influxdb
-version: 1.5.0
+version: 2.0.0
 appVersion: 1.7.6
 description: Scalable datastore for metrics, events, and real-time analytics.
 keywords:

stable/influxdb/README.md

@@ -86,3 +86,7 @@ Make sure to uncomment or configure the job settings after enabling it. If a pas
 ### From < 1.0.0 To >= 1.0.0
 
 Values `.Values.config.bind_address` and `.Values.exposeRpc` no longer exist. They have been replaced with `.Values.config.rpc.bind_address` and `.Values.config.rpc.enabled` respectively. Please adjust your values file accordingly.
+
+### From < 1.5.0 to >= 2.0.0
+
+The Kubernetes API change to support 1.160 may not be backwards compatible and may require the chare to be uninstalled in order to upgrade.  See [this issue](https://github.com/helm/helm/issues/6583) for some background.

stable/influxdb/templates/deployment.yaml

-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: "{{ template "influxdb.fullname" . }}"
@@ -9,6 +9,10 @@ metadata:
     heritage: "{{ .Release.Service }}"
 spec:
   replicas: 1
+  selector:
+    matchLabels:
+      app: {{ template "influxdb.fullname" . }}
+      release: "{{ .Release.Name }}"
   template:
     metadata:
       labels:

stable/influxdb/templates/ingress.yaml

 {{- if .Values.ingress.enabled -}}
-apiVersion: extensions/v1beta1
+apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
   name: "{{ template "influxdb.fullname" . }}"