Merge pull request #877 from mattyb149/dev

[CLEANUP] Remove import of Drools StringUtils from TextFileOutput
[PDI-9289] Fixed issue with casting value in ExcelWriterMetaInjection
Merge pull request #885 from mattyb149/PDI-9289

[PDI-9289] Fixed issue with casting value in ExcelWriterMetaInjection
[TEST] Include integration tests, exclude UI classes for code coverage