Bug 178164 Use IEngineTask.status constants and remove unnecessary status variables in EngineTask.
1)Remove following redundant variables in EngineTask used for status info. protected final int RUNNING_STATUS_START = 0; protected final int RUNNING_STATUS_RUNNING = 1; protected final int RUNNING_STATUS_STOP = 2; EngineTask already has access to constants declared in IEngineTask. Use those instead. 2)Remove the unused errorHandlingOption in EngineTask.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/EngineTask.java
if ( defaultOptions == null )
		{
			defaultOptions = (IRenderOption) configs
					.get( IRenderOption.OUTPUT_FORMAT_HTML );
		}
		if ( defaultOptions != null )
		{
			options.putAll( defaultOptions.getOptions( ) );
		}
		
		IRenderOption formatOptions = (IRenderOption) configs.get( format );
		if ( formatOptions != null )
		{
			options.putAll( formatOptions.getOptions( ) );
		}
		
		if ( emitterID != null )
		{
			IRenderOption emitterOptions = (IRenderOption) configs
					.get( emitterID );
			if ( emitterOptions != null )
			{
				options.putAll( emitterOptions.getOptions( ) );
			}
		}
		
		if ( renderOptions != null )
		{
			options.putAll( renderOptions.getOptions( ) );
		}