Bug 152828 Add the projectFolder property on module
When user doesn't set the resource folder path in designer, there should be a default working path for Birt to manage the report design and find the related resources. A new property should be added on Module: name: projectFolder type:URL This property only can be given from the open design method from session but should not be set after the module initialized. Concern about the backward compatiblity issue, a new method will be added. Open design with a config argument.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DefaultResourceLocator.java
{
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.api.IResourceLocator#findResource(org.eclipse.birt.report.model.api.ModuleHandle,
	 *      java.lang.String, int)
	 */
	public URL findResource( ModuleHandle moduleHandle, String fileName,
			int type )
	{
		if ( fileName == null )
			return null;
		
		try
		{
			File f = new File( fileName );
			if ( f.isAbsolute( ) )
				return f.exists( ) && f.isFile( ) ? f.getCanonicalFile( )
						.toURL( ) : null;
		}
		catch ( IOException e )
		{
			return null;
		}
		
		try
		{
			URL objURI = new URL( fileName );