Fixed ODBC Driver name that is to be used.
Fixed ODBC Driver name that is to be used.

The library would connect to the driver called "EXASOL". However
under windows the ODBC driver name is actually "EXASolution Driver"
Using the wrong driver name resulted in errors when trying to connect
to the database with the exa+pyodbc dialect and driver combination

expobrain/sqlalchemy_exasol,expobrain/sqlalchemy_exasol