Handling of fixed-length datatypes is not handled consistently

Some data sources like Oracle & SQL Server allow char datatypes with length > 1.

JDBC importer (via TEIIDDES-2061) converts d-type to string but changes the char to a varchar native type

Teiid Connection importer will create a char(10) datatype if the column's datatype is string(10) and the native type is char

In both instances, the datatype should end up being string(10) and the native type == char