Bug 188578 Add "displayColumnName" on TabularLevel
Add Property "displayColumnName" on TabbularLevel and corresponding APIs on handle. Property Type: expression.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
HighlightRule rule = (HighlightRule) list.get( i );
				writer.startElement( DesignSchemaConstants.STRUCTURE_TAG );
				property( rule, StyleRule.IS_DESIGN_TIME_MEMBER );
				property( rule, StyleRule.OPERATOR_MEMBER );
				property( rule, HighlightRule.BACKGROUND_COLOR_MEMBER );
				
				property( rule, HighlightRule.BORDER_TOP_STYLE_MEMBER );
				property( rule, HighlightRule.BORDER_TOP_WIDTH_MEMBER );
				property( rule, HighlightRule.BORDER_TOP_COLOR_MEMBER );
				property( rule, HighlightRule.BORDER_LEFT_STYLE_MEMBER );
				property( rule, HighlightRule.BORDER_LEFT_WIDTH_MEMBER );
				property( rule, HighlightRule.BORDER_LEFT_COLOR_MEMBER );
				property( rule, HighlightRule.BORDER_BOTTOM_STYLE_MEMBER );
				property( rule, HighlightRule.BORDER_BOTTOM_WIDTH_MEMBER );
				property( rule, HighlightRule.BORDER_BOTTOM_COLOR_MEMBER );
				property( rule, HighlightRule.BORDER_RIGHT_STYLE_MEMBER );
				property( rule, HighlightRule.BORDER_RIGHT_WIDTH_MEMBER );
				property( rule, HighlightRule.BORDER_RIGHT_COLOR_MEMBER );
				
				property( rule, HighlightRule.FONT_FAMILY_MEMBER );
				property( rule, HighlightRule.FONT_SIZE_MEMBER );
				property( rule, HighlightRule.FONT_STYLE_MEMBER );
				property( rule, HighlightRule.FONT_WEIGHT_MEMBER );
				property( rule, HighlightRule.FONT_VARIANT_MEMBER );
				property( rule, HighlightRule.COLOR_MEMBER );
				property( rule, HighlightRule.TEXT_UNDERLINE_MEMBER );
				property( rule, HighlightRule.TEXT_OVERLINE_MEMBER );
				property( rule, HighlightRule.TEXT_LINE_THROUGH_MEMBER );
				property( rule, HighlightRule.TEXT_ALIGN_MEMBER );
				property( rule, HighlightRule.TEXT_TRANSFORM_MEMBER );