Ignore TLS certificates for tests

[tomuben]

Background

The current configuration, using a new version of pyodbc has problems when the SQL query returns a very long error message (see mkleehammer/pyodbc#747). This was fixed in newer version. However, to fix the issue, clients also need to use the newer ODBC driver from Exasol.
However, new versions of the Exasol ODBC driver have TLS enabled per default. As we have the docker db running locally in the test framework it is safe connect to the docker db without TLS. In order to support this, we need to disable TLS in the temporary odbc.ini file.

Acceptance Criteria

• disable TLS in the temporary odbc.ini file