router-perf-v2 fails due to `oc cp` failing

**Describe the bug**
When copying the mb configuration file to the client pod, we have seen this fail, and there is no retry.

```shell
[2023-04-03, 18:27:08 UTC] {subprocess.py:92} INFO - Mon Apr 3 18:27:08 UTC 2023 Sleeping for 60s before next test
[2023-04-03, 18:28:08 UTC] {subprocess.py:92} INFO - Mon Apr 3 18:28:08 UTC 2023 Generating config for termination reencrypt with 1 clients 50 keep alive requests and path /1024.html
[2023-04-03, 18:28:09 UTC] {subprocess.py:92} INFO - Mon Apr 3 18:28:09 UTC 2023 Copying mb config http-scale-reencrypt.json to pod http-scale-client-656b4ccb67-nspv8
[2023-04-03, 18:28:09 UTC] {subprocess.py:92} INFO - Error from server: error dialing backend: write tcp 10.0.194.34:52724->10.0.98.224:10250: use of closed network connection
[2023-04-03, 18:28:09 UTC] {subprocess.py:92} INFO - bdd8fe86-router-20230403
[2023-04-03, 18:28:09 UTC] {subprocess.py:96} INFO - Command exited with return code 1
```

**To Reproduce**
n/a

**Expected behavior**
`oc cp` to succeed.

**Screenshots**