Disabling cache not working in Appsync / appollo

**Describe the bug**
Setting the ResponseFecther policy to NETWORK_ONLY still returns cached data

**To Reproduce**
Steps to reproduce the behavior:
1. Create a AWSAppSyncClient
2. Call a request adding query.responseFetcher(AppSyncResponseFetchers.CACHE_AND_NETWORK)
3. Make sure that the response has changed after
4. Call again request adding
query.responseFetcher(AppSyncResponseFetchers.NETWORK_ONLY)
5. Check that the response is the previous one.

**Expected behavior**
Appsync should not cache any date if the responseFetcher has AppSyncResponseFetchers.NETWORK_ONLY

Start by reproducing the behavior with AWSAppSyncClient and the query.responseFetcher entry points described in the report, comparing CACHE_AND_NETWORK with NETWORK_ONLY after the server response changes. Trace the response-fetching and cache path to determine why NETWORK_ONLY returns the previous response. Done means a NETWORK_ONLY request returns fresh network data without using the cached result.

Written by the indexing model from the issue text.