Bug 132786 Value2 should be cleaned after convert operator from between to equal in highlight rule.
Description: Value2 should be cleaned after convert operator from between to equal in highlight rule. Steps to reproduce: 1. Insert a data. 2. Set highlight rule in Property Editor. 2 between 1 and 3, color blue. 3. Save the report 4. Modify highlight rule, change to 1 equal 1, color blue. 5. Save the report, see generated xml source. Expected result: In xml source, value2 should be cleaned in highlight expression. Actual result: In xml source, value1 is 1 and value2 is 3.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/HighlightRuleHandle.java
* @throws SemanticException
	 *             if the value is not one of the above.
	 */
	public void setTextAlign( String value ) throws SemanticException
	{
		setProperty( HighlightRule.TEXT_ALIGN_MEMBER, value );
	}
	/**
	 * Returns the value of the text transform property. The return value is
	 * defined in <code>DesignChoiceConstants</code> and can be one of:
	 * <ul>
	 * <li><code>TRANSFORM_CAPITALIZE</code>
	 * <li><code>TRANSFORM_UPPERCASE</code>
	 * <li><code>TRANSFORM_LOWERCASE</code>
	 * <li><code>TRANSFORM_NONE</code>
	 * </ul>
	 * 
	 * @return the value of the transform property
	 */
	public String getTextTransform( )
	{
		return getStringProperty( HighlightRule.TEXT_TRANSFORM_MEMBER );
	}
	/**
	 * Sets the text transform property. The input value is defined in
	 * <code>DesignChoiceConstants</code> and can be one of:
	 * <ul>
	 * <li><code>TRANSFORM_CAPITALIZE</code>
	 * <li><code>TRANSFORM_UPPERCASE</code>
	 * <li><code>TRANSFORM_LOWERCASE</code>