Bug 155478 [regression]Numbers in cascading group displays incorrectly
Description: Numbers in cascading group displays incorrectly. Steps to reproduce: 1. New sample data source and dataset from table ORDERS. 2. New a cascading group with two sub parameters, the first is from STATUS and the second is from ORDERNUMBER. 3. Preview 4. Select a status value in poped up parameter dialog, see ordernumber list Expected result: See 10100, 10101, such kind of format. Actual result: I saw 10.100, 10.167..., I just listed out the numbers as example
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
if ( number == null )
				return null;
			return new Integer( number.intValue( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_BOOLEAN
				.equalsIgnoreCase( dataType ) )
		{
			return doValidateBoolean( value, locale );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_STRING
				.equalsIgnoreCase( dataType ) )
		{
			return value;
		}
		else
		{
			assert false;
			return null;
		}
	}
	/**
	 * Validates the input value at the given locale. The format is: short date
	 * and medium time.
	 * 
	 * @param value
	 *            the value to validate
	 * @param locale
	 *            the locale information
	 * @return the date value if validation is successful
	 * @throws ValidationValueException