Colums destination instead of source

[romanbracinik]

Jira: KBC-XXX

Before asking for review make sure that:

• [x] In the case of modified import queries, I checked that the CustomQuery component is updated.

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Zacal som pisat import z WS v driveru a padali mi testy na tom ze cielova tabulka nema dany stlpce (v testoch sa schvalne berie zo stlpca col2 a destination tabulka ma stlpec col4) ked som sa pozerel na TD tak je to tam rovnako ako v tomto PR https://github.com/keboola/php-db-import-export/blob/master/src/Backend/Teradata/ToStage/FromTableInsertIntoAdapter.php#L37-L39