Bug 168172 Add the get() and set() functions of HideDetail parameter on IGroup
Add the get() and set() functions of HideDetail parameter on IGroup, and thus enable the hidedetail shifting on the Group through eventhandler.
engine/org.eclipse.birt.report.engine.tests/test/org/eclipse/birt/report/engine/api/script/element/ElementTest.java
import org.eclipse.birt.report.engine.api.script.ScriptException;
import org.eclipse.birt.report.engine.script.internal.element.ActionImpl;
import org.eclipse.birt.report.engine.script.internal.element.Cell;
import org.eclipse.birt.report.engine.script.internal.element.DataItem;
import org.eclipse.birt.report.engine.script.internal.element.DataSet;
import org.eclipse.birt.report.engine.script.internal.element.DataSource;
import org.eclipse.birt.report.engine.script.internal.element.DynamicText;
import org.eclipse.birt.report.engine.script.internal.element.Grid;
import org.eclipse.birt.report.engine.script.internal.element.Group;
import org.eclipse.birt.report.engine.script.internal.element.HideRuleImpl;
import org.eclipse.birt.report.engine.script.internal.element.HighlightRuleImpl;
import org.eclipse.birt.report.engine.script.internal.element.Image;
import org.eclipse.birt.report.engine.script.internal.element.Label;
import org.eclipse.birt.report.engine.script.internal.element.List;
import org.eclipse.birt.report.engine.script.internal.element.Listing;
import org.eclipse.birt.report.engine.script.internal.element.ReportItem;
import org.eclipse.birt.report.engine.script.internal.element.Row;
import org.eclipse.birt.report.engine.script.internal.element.StyleDesign;
import org.eclipse.birt.report.engine.script.internal.element.Table;
import org.eclipse.birt.report.engine.script.internal.element.TextItem;
import org.eclipse.birt.report.model.api.ActionHandle;
import org.eclipse.birt.report.model.api.CellHandle;
import org.eclipse.birt.report.model.api.DataItemHandle;
import org.eclipse.birt.report.model.api.DataSetHandle;
import org.eclipse.birt.report.model.api.DataSourceHandle;
import org.eclipse.birt.report.model.api.DesignConfig;
import org.eclipse.birt.report.model.api.DesignEngine;
import org.eclipse.birt.report.model.api.ElementFactory;
import org.eclipse.birt.report.model.api.GridHandle;
import org.eclipse.birt.report.model.api.GroupHandle;