Check  dpdk-telemetry plugin behavior when DPDK running.

1)Enable  plugin in collectd.conf

2)Run DPDK

3)Run collectd

The plugin should connect to DPDK server socket

and should see the DPDK  port and global stats been read in stats path.

Check  dpdk-telemetry

plugin behavior when DPDK not running and resume running again. 

1)Enable  plugin in collectd.conf

2)Do not start DPDK yet

3)Run collectd

4)Now run DPDK

The plugin connection to DPDK server socket

 should not succeed and no stats should be read to stats path initially.

Once after DPDK started, connection to server should resume and

stats should be read to stats path.

Check  dpdk-telemetry behavior when DPDK stops running in the middle of the test and starts running again.

1)Enable  plugin in collectd.conf

2)Run DPDK

3)Run collectd

4)Stop DPDK

5)Start DPDK

The plugin should connect to DPDK server socket and should see the DPDK  port and global stats been read in stats path.

Once DPDK stopped, connection to server should be retried by plugin and stats  update should stop.

Next when DPDK started, the connection retry to server socket should be success and stats  update should be resumed.