Update playbooks to support new netchecker

Netchecker is rewritten in Go lang with some new args instead of
env variables. Also netchecker-server no longer requires kubectl
container. Updating playbooks accordingly.

roles/kubernetes-apps/ansible/templates/netchecker-agent-ds.yml

@@ -20,8 +20,11 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: metadata.name
-            - name: REPORT_INTERVAL
-              value: '{{ agent_report_interval }}'
+          args:
+            - "-v=5"
+            - "-alsologtostderr=true"
+            - "-serverendpoint=netchecker-service:8081"
+            - "-reportinterval={{ agent_report_interval }}"
           imagePullPolicy: {{ k8s_image_pull_policy }}
           resources:
             limits: