drill

bd0458e0 - DRILL-8106: do not use cellIterator because it skips empty cells (#2426)

DRILL-8106: do not use cellIterator because it skips empty cells (#2426) * [DRILL-8106] do not use cellIterator because it skips empty cells * Update ExcelBatchReader.java * Update ExcelBatchReader.java * Update ExcelBatchReader.java * Update ExcelBatchReader.java * Create missing_data.xlsx * Update TestExcelFormat.java * Update TestExcelFormat.java