Bug 177693 Support Date/Time data type in BIRT report engine.
Report engine needs to support new BIRT data type Date/Time. Please see attached for details.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/IScalarParameterDefn.java
public static final int TYPE_FLOAT = 2;
	public static final int TYPE_DECIMAL = 3;
	public static final int TYPE_DATE_TIME = 4;
	public static final int TYPE_BOOLEAN = 5;
	public static final int TYPE_INTEGER = 6;
	
	public static final int SELECTION_LIST_NONE = 0;
	public static final int SELECTION_LIST_DYNAMIC = 1;
	public static final int SELECTION_LIST_STATIC = 2;
	
	public static final String SELECTION_LIST_TYPE_STATIC = "static";
	public static final String SELECTION_LIST_TYPE_DYNAMIC = "dynamic";
	
	/**
	 * returns the parameter data type. See the ColumnDefn class
	 * for the valid data type constants.
	 * 
	 * @return the parameter data type
	 */
	
	int getDataType( );
	/** 
	 * returns whether the user can enter a value different from values in a selection list
	 * Applies only to parameters with a selection list. Usually, a parameter with 
	 * allowNewValue=true is displayed as a combo-box, while a parameter with 
	 * allowNewValue=false is displayed as a list. This is only a UI gesture. Engine does
	 * not validate whether the value passed in is in the list.
	 *  
	 * @return whether the user can enter a value different from all values
	 *         in the list. Applies only when the parameter has a selection list.