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/impl/DataEngineImpl.java
"DataEngine.defineDataSet: " + LogUtil.toString( dataSet ) );
					
		if ( !(dataSet instanceof IJointDataSetDesign) )
		{
			
			
			String dataSourceName = dataSet.getDataSourceName( );
			DataSourceRuntime dsource = this.getDataSourceRuntime( dataSourceName );
			if ( dsource == null )
			{
				DataException e = new DataException( ResourceConstants.UNDEFINED_DATA_SOURCE,
						dataSourceName );
				logger.logp( Level.WARNING,
						DataEngineImpl.class.getName( ),
						"defineDataSet",
						"Data source {" + dataSourceName + "} is not defined",
						e );
				throw e;
			}
			Class dSourceClass;
			if ( dataSet instanceof IOdaDataSetDesign )
				dSourceClass = IOdaDataSourceDesign.class;
			else if ( dataSet instanceof IScriptDataSetDesign )
				dSourceClass = IScriptDataSourceDesign.class;
			else
			{
				DataException e = new DataException( ResourceConstants.UNSUPPORTED_DATASET_TYPE );
				logger.logp( Level.WARNING,
						DataEngineImpl.class.getName( ),
						"defineDataSet",