修复条件属性中前景色和字体因默认值导致覆盖单元格中配置的前景色和字体属性的BUG

ureport2-core/src/main/java/com/bstek/ureport/definition/CellStyle.java

@@ -31,9 +31,9 @@ import com.bstek.ureport.Utils;
 public class CellStyle implements Serializable{
 	private static final long serialVersionUID = 8327688051735343849L;
 	private String bgcolor;
-	private String forecolor="0,0,0";
+	private String forecolor;
 	private int fontSize=10;
-	private String fontFamily="宋体";
+	private String fontFamily;
 	private String format;
 	private float lineHeight;
 	private Alignment align;