fix : 설정 > 원가 설정 - 기준일자 datepicker 적용

(cherry picked from commit 56f29943b6)

src/main/java/com/wb/domainserver/domain/gcone/setup/cost/vo/BOCostVO.java

@@ -14,7 +14,7 @@ public class BOCostVO extends AbstractVO {
 	private int[] ctInnbArr;
 
 	/** 기준일자 */
-	private int[] stdrDeArr;
+	private String[] stdrDeArr;
 
 	/** USD 환율 (1,000 円) */
 	private BigDecimal[] usdRateArr;