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/IResourceLocator.java
{
	/**
	 * The host name of the fragments where inner resources are located.
	 */
	public final static String FRAGMENT_RESOURCE_HOST = "org.eclipse.birt.resources"; 
	/**
	 * The type of the images to search
	 */
	public final static int IMAGE = 1;
	/**
	 * The type of the libraries to search
	 */
	public final static int LIBRARY = 2;
	/**
	 * The type of the cascading style sheet to search.
	 */
	public final static int CASCADING_STYLE_SHEET = 3;