VOL-570 : Change network type used by voltha components

- Updated from weave to calico which is the default network type
- Updated ponsim README file
- Removed deprecated data folder

Amendments:

- Change to specific version of kafka/zookeeper
- Added annotations statement to netconf manifest

Change-Id: Ibc8c06f037c275717b5c79b60443b7fd11545405
diff --git a/k8s/kafka.yml b/k8s/kafka.yml
index a75bbeb..706eed4 100644
--- a/k8s/kafka.yml
+++ b/k8s/kafka.yml
@@ -30,7 +30,7 @@
       labels:
         app: kafka
       annotations:
-        cni: "weave"
+        cni: "calico"
     spec:
       terminationGracePeriodSeconds: 10
       affinity: