execute: expose cells FORMATTED_VALUE

webpivottalbes uses this to display cell value in pivot table

olapy/core/services/xmla_execute_tools.py

@@ -345,6 +345,7 @@ class XmlaExecuteTools():
             cell_data += """
             <Cell CellOrdinal="{0}">
                 <Value xsi:type="xsd:int">{1}</Value>
+                <FmtValue>{1}</FmtValue>
             </Cell>
             """.format(index, value)
             index += 1
@@ -528,6 +529,7 @@ class XmlaExecuteTools():
             <BackColor name="BACK_COLOR" type="xs:unsignedInt"/>
             <ForeColor name="FORE_COLOR" type="xs:unsignedInt"/>
             <FontFlags name="FONT_FLAGS" type="xs:int"/>
+            <FmtValue name="FORMATTED_VALUE" type="xsd:string"/>
         </CellInfo>"""
 
     def generate_slicer_axis(self, mdx_execution_result):