Bug 206093 bar chart: title of y axis is not aligned according to the y axe.
Build ID: v20070924-0630 Steps To Reproduce: 1. Create a bar chart 2. For y axis enter a Title and set the alignment to center 3. See the chart, the y axis title is not aligned according to the y axe; it is center aligned with the height of the chart. More information: see attached chart image example: the first image at the top is how Birt aligned the y axis label and the second image at the bottom is the proposition of aligment according to the y axe
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderHelper.java
{
			return new DatetimeAxisTypeComputation( );
		}
		throw new ChartException( ChartEnginePlugin.ID,
				ChartException.RENDERING,
				"exception.undefined.axis.type", 
				Messages.getResourceBundle( getRunTimeContext( ).getULocale( ) ) );
	}
	void renderVerticalAxisByType( ComputationContext context, double dXEnd,
			double dZEnd, double dZ, double dStaggeredLabelOffset )
			throws ChartException
	{
		
		
		final int iDirection = sc.getDirection( ) != IConstants.FORWARD ? -1
				: 1;
		IAxisTypeComputation computation = createAxisTypeComputation( context );
		computation.initialize( );
		
		final double dOffset = computation instanceof TextAxisTypeComputation
				&& bTickBetweenCategories ? iDirection * sc.getUnitSize( ) / 2
				: 0;
		
		final int length = computation instanceof TextAxisTypeComputation ? da.size( ) - 1
				: da.size( );
		final double x = ( iLabelLocation == IConstants.LEFT ) ? context.dTick1 - 1
				: context.dTick2 + 1;
		for ( int i = 0; i < length; i++ )
		{
			computation.handlePreEachTick( i );