[Update] NPD systemd-monitor lookback duration

This ps adds the lookback duration of 5m to the systemd-monitor to avoid
looking back indefinitely in journal log and causing the alert to stick around.

Change-Id: Ia32f043c0c7484d0bb92cfc4b68b506eae8e9d72

kubernetes-node-problem-detector/Chart.yaml

@@ -15,7 +15,7 @@ apiVersion: v1
 appVersion: v1.0.0
 description: OpenStack-Helm Kubernetes Node Problem Detector
 name: kubernetes-node-problem-detector
-version: 0.1.3
+version: 0.1.4
 home: https://github.com/kubernetes/node-problem-detector
 sources:
   - https://github.com/kubernetes/node-problem-detector

kubernetes-node-problem-detector/values.yaml

@@ -333,7 +333,7 @@ conf:
           pluginConfig:
             source: systemd
           logPath: "/var/log/journal"
-          lookback: ''
+          lookback: 5m
           bufferSize: 10
           source: systemd-monitor
           conditions: []

releasenotes/notes/kubernetes-node-problem-detector.yaml

@@ -4,4 +4,5 @@ kubernetes-node-problem-detector:
   - 0.1.1 Change helm-toolkit dependency version to ">= 0.1.0"
   - 0.1.2 Unpin images built with osh-images
   - 0.1.3 Update RBAC apiVersion from /v1beta1 to /v1
+  - 0.1.4 Update the systemd-monitor lookback duration
 ...