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 ( !visitScalarParameter( (ScalarParameterHandle) param,
							value ) )
					{
						return false;
					}
				}
			}
			return true;
		}
		boolean visitCascadingParamterGroup(
				CascadingParameterGroupHandle group, Object value )
		{
			return visitParameterGroup( group, value );
		}
		boolean visitParameterGroup( ParameterGroupHandle group, Object value )
		{
			return false;
		}
		boolean visitScalarParameter( ScalarParameterHandle param, Object value )
		{
			return false;
		}
		boolean visit( ReportDesignHandle report )
		{
			return visit( report, null );
		}
		boolean visit( ReportDesignHandle report, Object value )
		{
			SlotHandle parameters = report.getParameters( );
			Iterator iter = parameters.iterator( );