This change is to perform counter statistics validation for nfv ovsdpdk
interfaces. The counters validated here are ovs_tx_failure_drops,
ovs_tx_mtu_exceeded_drops, ovs_rx_qos_drops, ovs_tx_qos_drops,
ovs_tx_retries.
Change-Id: I997385f9e36dc74d60fdf933c980a2b080158ddb