Bug 183918 get relative file path of linkage library
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/library/DesignLoadLibraryTest.java
openDesign( "DesignWithSemanticErrorLibrary.xml" ); 
		List libraries = designHandle.getAllLibraries( );
		assertEquals( 1, libraries.size( ) );
		LibraryHandle oneLibraryHandle = (LibraryHandle) libraries.get( 0 );
		assertTrue( oneLibraryHandle.isValid( ) );
		List errorList = oneLibraryHandle.getErrorList( );
		assertEquals( 1, errorList.size( ) );
		assertEquals( PropertyValueException.DESIGN_EXCEPTION_VALUE_EXISTS,
				( (ErrorDetail) errorList.get( 0 ) ).getErrorCode( ) );
	}
	/**
	 * Tests one report design including two library with same namespace.
	 * 
	 * @throws Exception
	 *             if any exception
	 */
	public void testLoadDesignWithDuplicateNamespace( ) throws Exception
	{
		try
		{
			openDesign( "DesignWithDuplicateNamespace.xml" ); 
			fail( );
		}
		catch ( DesignFileException e )
		{
			assertEquals(
					LibraryException.DESIGN_EXCEPTION_DUPLICATE_LIBRARY_NAMESPACE,
					( (ErrorDetail) e.getErrorList( ).get( 0 ) ).getErrorCode( ) );
		}
		try