Bug 155509 ModuleHandle findResource method does not support .properties files
There is no fileType for .properties files in IResourceLocator
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
while ( names.contains( name ) )
		{
			name = baseName + ++index;
		}
		image.setName( name.trim( ) );
	}
	/**
	 * Checks the element name in name space of this report.
	 * 
	 * <ul>
	 * <li>If the element name is required and duplicate name is found in name
	 * space, rename the element with a new unique name.
	 * <li>If the element name is not required, clear the name.
	 * </ul>
	 * 
	 * @param element
	 *            the element handle whose name is need to check.
	 */
	public void rename( DesignElement element )
	{
		if ( element == null )
			return;
		IElementDefn defn = element.getDefn( );
		if ( defn.getNameOption( ) == MetaDataConstants.REQUIRED_NAME
				|| element.getRoot( ) instanceof Library
				|| element.getName( ) != null )
			makeUniqueName( element );
		for ( int i = 0; i < defn.getSlotCount( ); i++ )
		{
			ContainerSlot slot = element.getSlot( i );