Bug 159380 [regression]Not find DataEngineContextExt class cause all engine/dte smoke testing fail
Description Not find DataEngineContextExt class cause all engine/dte smoke testing fail Steps to reproduce: Run Engine/DTE smoke testing framework Expected result&#65306; Outputs are correct. Actaul result: All outputs are 0kb with Exception: Error happened while running the report. java.lang.NoClassDefFoundError: org/eclipse/birt/data/engine/impl/DataEngineContextExt at org.eclipse.birt.data.engine.api.DataEngineContext.setTmpdir(DataEngineContext.java:374) at org.eclipse.birt.report.engine.data.dte.DteDataEngine.<init>(DteDataEngine.java:71) at org.eclipse.birt.report.engine.data.DataEngineFactory.createDataEngine(DataEngineFactory.java:94) at org.eclipse.birt.report.engine.executor.ExecutionContext.getDataEngine(ExecutionContext.java:694) at org.eclipse.birt.report.engine.executor.ReportExecutor.execute(ReportExecutor.java:99) at org.eclipse.birt.report.engine.internal.executor.l18n.LocalizedReportExecutor.execute(LocalizedReportExecutor.java:38) at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:68) at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:207) at org.eclipse.birt.report.engine.api.ReportRunner.runAndRenderReport(ReportRunner.java:237) at org.eclipse.birt.report.engine.api.ReportRunner.execute(ReportRunner.java:162) at org.eclipse.birt.report.engine.api.ReportRunner.main(ReportRunner.java:118)
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/api/DataEngineContext.java
IDocArchiveReader reader, IDocArchiveWriter writer )
			throws BirtException
	{
		return new DataEngineContext( mode, scope, reader, writer );
	}
	
	/**
	 * @param mode
	 * @param scope
	 * @param reader
	 * @param writer
	 * @throws BirtException
	 */
	private DataEngineContext( int mode, Scriptable scope,
			IDocArchiveReader reader, IDocArchiveWriter writer )
			throws BirtException
	{
		if ( !( mode == MODE_GENERATION
				|| mode == MODE_PRESENTATION || mode == DIRECT_PRESENTATION || mode == MODE_UPDATE ) )
			throw new DataException( ResourceConstants.RD_INVALID_MODE );
		if ( writer == null && mode == MODE_GENERATION )
			throw new DataException( ResourceConstants.RD_INVALID_ARCHIVE );
		if ( reader == null && mode == MODE_PRESENTATION )
			throw new DataException( ResourceConstants.RD_INVALID_ARCHIVE );
		if ( ( writer == null || reader == null )
				&& mode == MODE_UPDATE )
			throw new DataException( ResourceConstants.RD_INVALID_ARCHIVE );
		this.mode = mode;
		this.scope = scope;
		this.reader = reader;