Bug 158947 the error of the datetime type conversion
Description: Now we input "Jan 13, 2003 12:00 AM GMT0100" into the parameter as a default value. The time is not transformed base on the time zone "GMT0100". The time should be transformed. And the other form input e.g. "SUN Jan 13, 2003 12:00 AM GMT0100" should be identified correctly. Step to reproduce: 1. new a report and create a report parameter 2. choose the date type "DateTime" 3. input value "SUN Jan 13, 2003 12:00 AM GMT0100" as default value,ok to finish 4. error message appear 5. input value "SUN Jan 13, 2003 12:00 AM" and click ok Actuate result: the parameter value is still "01/13/2003 12:00:00 AM" Excepted result: the datetime value should be transformed base on the time zone.
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
* Boolean -> Double
	 * 		true 	-> 1
	 * 		others 	-> 0 
	 * Date -> Double
	 * 		Date.getTime();
	 * String -> Double
	 * 		Double.valueOf(String);
	 * @param source
	 * @return
	 * @throws BirtException
	 */
	public static Double toDouble( Object source ) throws BirtException
	{
		if ( source == null )
			return null;
		if ( source instanceof Double )
		{
			return (Double) source;
		}
		else if ( source instanceof Number )
		{
			
			double doubleValue = ( (Number) source ).doubleValue( );
			return new Double( doubleValue );
		}
		else if ( source instanceof Boolean )
		{
			if ( true == ( (Boolean) source ).booleanValue( ) )
				return new Double( 1d );
			return new Double( 0d );