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
return this.cacheCount;
	}
	/**
	 * This method is used to set the cache option for current data engine
	 * instance. These option values will override the values defined in
	 * individual data set and its application context. The option value has
	 * three posible values, CACHE_USE_DEFAULT, CACHE_USE_DISABLE,
	 * CACHE_USE_ALWAYS. The cacheCount values can be larger than 0, which
	 * indicates the count of how many rows will be ccached, equal to 0, which
	 * indicates cache will not be used, less than 0, which indicates the entire
	 * data set will be cached.
	 * 
	 * Please notice, this cache function only available for
	 * DIRECT_PRESENTATION. In other cases, exception will be thrown.
	 * 
	 * @param option
	 * @param cacheCount
	 */
	public void setCacheOption( int option, int cacheCount )
			throws BirtException
	{
		if ( this.mode != DIRECT_PRESENTATION )
			throw new DataException( ResourceConstants.CACHE_FUNCTION_WRONG_MODE );
		this.cacheOption = option;
		this.cacheCount = cacheCount;
	}
	
	/**
	 * According to the paramters of streamID, subStreamID and streamType, an
	 * output stream will be created for it. To make stream close simply, the