🐛 Airbyte Core: Large schema fetching failure

## Enviroment
- **Airbyte version**: 0.26.4-alpha
- **OS Version / Instance**: macOS 11.2.3
- **Deployment**: Docker
- **Source Connector and version**: Salesforce 0.2.3
- **Destination Connector and version**: Local CSV 0.2.7, BigQuery 0.3.7
- **Severity**: High
- **Step where error happened**: Setup new connection

## Current Behavior
When fetching the large schema from the source, it fails with the next error I found in doker-compose up logs output:
It has nothing to do with the source itself. I used this just to catch this issue

```
org.glassfish.jersey.server.ServerRuntime$Responder writeResponse
SEVERE: An I/O error has occurred while writing a response message entity to the container output stream.
```

It runs unlit the end of the daily request quota. Then schema fetching fails due to limits.

## Expected Behavior
The size of the schema shouldn't affect the UI work.

## Logs
[error_log.txt](https://github.com/airbytehq/airbyte/files/6768958/error_log.txt)

## Steps to Reproduce
1. docker compose up airbyte project
2. create source Salesforce
3. create local CSV or BigQuery destination
4. set up a connection
5. see the error in docker compose up command output

I also tried to do this with filtered out streams and it worked well.

## Are you willing to submit a PR?
No