DIS-397 Add logging to INN-Reach results fetch method

[tomascohen]

This patch adds

• logging of the external request made to INN-Reach, through ExternalRequestLogEntry::logRequest
• a check for the HTTP response status code, and if it is not 200, an error log will be generated

Test plan:

1. Enable the INN-Reach integration
2. Have random credentials for the OAuth2 section
3. Perform a search
4. Make sure your IP gets external requests logged => An error log should be generated
   => There's a log on the external requests logs

[tomascohen]

For the record, I ran the QA bash script lines locally and cannot reproduce the error tabs vs. spaces error. Any advise is welcome.