Bug 162167 Add API IResultIterator.isEmpty to Data Engine.
Current DTE api do not have a method that can be directly used to tell the client whether an IResultIterator is empty or not.We need to add this api for the convenience sake.
engine/org.eclipse.birt.report.engine.tests/test/org/eclipse/birt/report/engine/api/script/RowDataTest.java
{
		assertEquals( "4", rowData.getExpressionValue( "row[test1]" ) );
	}
	public void testWithCapital( ) throws ScriptException
	{
		assertEquals( "5", rowData.getExpressionValue( "ROW[test]" ) );
	}
	public void testWithMixed( ) throws ScriptException
	{
		assertEquals( "6", rowData.getExpressionValue( "ROw[test]" ) );
	}
	public void testWithUnderscore( ) throws ScriptException
	{
		assertEquals( "7", rowData.getExpressionValue( "row[test_1]" ) );
	}
	public void testWithMultipleParts1( ) throws ScriptException
	{
		assertEquals( "8", rowData.getExpressionValue( "row[test] + test" ) );
	}
	public void testWithMultipleParts2( ) throws ScriptException
	{
		assertEquals( "9", rowData
				.getExpressionValue( "row[test] + row[testit]" ) );
	}
	
	private class FakeResultSetTest implements IResultSet
	{
		protected IResultIterator rs = null;
		
		public FakeResultSetTest( IResultIterator rs )