The voltha metrics for the NNI and PON ports are not updated

The NNI and PON Port related metrics are not updated  by the openolt-agent/openolt-adapter

for PON Port the only the below metric is updated 

voltha_olt_tx_packets_total

For NNI port none of the metrics is updated.

Please find the kafka logs and the prometheus end point logs attached for reference

In the test the PON port number "536870912" is the pon connected to ONU and as shown in the logs most of the NNI and PON port metrics are empty.