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
/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IEngineTask#setParameterValues(java.util.HashMap)
	 */
	public void setParameterValues( Map params )
	{
		Iterator iterator = params.entrySet( ).iterator( );
		while ( iterator.hasNext( ) )
		{
			Map.Entry entry = (Map.Entry) iterator.next( );
			String name = (String) entry.getKey( );
			Object value = entry.getValue( );
			setParameterValue( name, value );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.IEngineTask#setParameterValue(java.lang.String,
	 *      java.lang.Object)
	 */
	public void setParameterValue( String name, Object value )
	{
		log.log( Level.FINE, "EngineTask.setParameterValue: {0}={1} [{2}]",
				new Object[]{name, value,
						value == null ? null : value.getClass( ).getName( )} );
		parameterChanged = true;
		Object parameter = inputValues.get( name );
		if ( parameter != null )