Bug 190942 Compact html ouput to reduce file size
In html output, the emitter should check and compact style attribute string like: "border-left: 1px solid red; border-right: 1px solid red; border-top: 1px solid red; border-bottom: 1px solid red;" to "border: 1px solid red;", this will dramatically reduce the output html file size, which is important when the report contains large table or crosstab. This is also true for padding, margin and other style properties.
engine/org.eclipse.birt.report.engine.emitter.html/src/org/eclipse/birt/report/engine/emitter/html/MetadataEmitter.java
writer.attribute( HTMLTags.ATTR_STYLE, " border: 2px solid black;" );
		}
	}
	/**
	 * wrap the top-level template table
	 * 
	 * @param table
	 *            table content
	 */
	public void endWrapTable( ITableContent table )
	{
		if ( wrapTemplateTable && ( table.getInstanceID( ) == wrapperTableIID ) )
		{
			wrapperTableIID = null;
			writer.closeTag( HTMLTags.TAG_TD );
			writer.closeTag( HTMLTags.TAG_TR );
			writer.closeTag( HTMLTags.TAG_TBODY );
			writer.closeTag( HTMLTags.TAG_TABLE );
		}
	}
	
	/**
	 * Generates description text for the filters of a column which contains the
	 * specified cell.
	 * 
	 * @param cell
	 *            the cell.
	 * @return the description text.
	 */
	private String getColumnFilterText( ICellContent cell )