Fixes https://github.com/AliHichem/AliDatatableBundle/issues/44
The bug occurs when 'SELECT' fields are not unique
The bug occurs when 'SELECT' fields are not unique,
modify ONLY the 'SELECT' statement fields.
Polish translations
Merge pull request #51 from 76200/master

Fixes https://github.com/AliHichem/AliDatatableBundle/issues/44