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/api/ModuleHandle.java
public Iterator configVariablesIterator( )
	{
		return getFilteredStructureList( CONFIG_VARS_PROP,
				ConfigVariable.NAME_MEMBER ).iterator( );
	}
	/**
	 * Returns the iterator over all structures of color palette. Each one is
	 * the instance of <code>CustomColorHandle</code>
	 * 
	 * @return the iterator over all structures of color palette.
	 * @see CustomColorHandle
	 */
	public Iterator customColorsIterator( )
	{
		return getStructureList( COLOR_PALETTE_PROP ).iterator( );
	}
	/**
	 * Drops a config variable.
	 * 
	 * @param name
	 *            config variable name
	 * @throws SemanticException
	 *             if no config variable is found.
	 * @deprecated
	 */
	public void dropConfigVariable( String name ) throws SemanticException
	{
		PropertyHandle propHandle = this.getPropertyHandle( CONFIG_VARS_PROP );
		int posn = findConfigVariablePos( name );
		if ( posn < 0 )