GH-108-Ensure ANTLR generated code is process by build
Remove sqlparser/generated classes
Ensure generated classes are added to src files list

Signed-off-by: Rodrigo Pastrana <Rodrigo.Pastrana@lexisnexis.com>
GH-108 minor change from code review.

Signed-off-by: Rodrigo Pastrana <Rodrigo.Pastrana@lexisnexis.com>
Merge pull request #109 from rpastrana/GH-108-antlr-generatedcode

GH-108-Ensure ANTLR generated code is process by build