Flaky stream load balancing

Nobody has claimed this yet.

From time to time, the stream is not load balanced correctly between Mist nodes. I attach the logs of both catalyst nodes.

[logs-node-1.txt](https://github.com/livepeer/catalyst/files/9221102/logs-node-1.txt)
[logs-node-2.txt](https://github.com/livepeer/catalyst/files/9221103/logs-node-2.txt)

### Steps to reproduce

#### 1. Check out the code from the branch with additional debug logs

Check out the branch [`reproduce-load-balancing-issue`](https://github.com/livepeer/catalyst/tree/rafal/reproduce-load-balancing-issue). It adds additional logs and increases the timeout of the E2E Test

#### 2. Run many tests sequentially to reproduce the flakiness

```
for i in $(seq 0 30); do go test -timeout 30m -v ./test/e2e/*; done
```

#### 3. Notice that a test was stuck

You should see a message that the test is stuck.

```
#####
STUCK in requireReplicatedStream
```

#### 4. Check the container logs

Now, you can check the logs of the containers and investigate the issue.

```
docker ps
```

Check out the reproduce-load-balancing-issue branch and run the repeated E2E command in test/e2e. Start with the requireReplicatedStream stuck message, then inspect the attached logs and Docker container logs. Done means identifying the cause of the incorrect stream distribution between Mist nodes.

Written by the indexing model from the issue text.