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
/**
	 * 
	 * @param dateStyle
	 * @param locale
	 * @return
	 */
	public static DateFormat getDateInstance( int dateStyle, ULocale locale )
	{
		String key = String.valueOf( dateStyle ) + ":" + locale.getName( );
		
		DateFormat result = (DateFormat) dateFormatHolder.get( key );
		
			
		if ( result == null )
		{
			synchronized ( dateTimeFormatholder )
			{
				result = (DateFormat)dateFormatHolder.get( key );
				if ( result == null )
				{
					result = DateFormat.getDateInstance( dateStyle, locale );
					result.setLenient( false );
					dateFormatHolder.put( key, result );
				}
			}
		}
		return result;
	}
}