reflect the property name changes also in the idl files

DataPoints now support the whole css::drawing::FillProperties properties
which makes handling fill properties in chart2 a lot easier. The new
names are just aliases for the old property names.

Change-Id: I5b85010fe2557eeb5376de71ff3605b3abbcd488

chart2/source/model/main/DataPoint.cxx

@@ -284,7 +284,8 @@ void DataPoint::fireModifyEvent()
 
 Sequence< OUString > DataPoint::getSupportedServiceNames_Static()
 {
-    Sequence< OUString > aServices( 3 );
+    Sequence< OUString > aServices( 4 );
+    aServices[ 0 ] = "com.sun.star.drawing.FillProperties";
     aServices[ 0 ] = "com.sun.star.chart2.DataPoint";
     aServices[ 1 ] = "com.sun.star.chart2.DataPointProperties";
     aServices[ 2 ] = "com.sun.star.beans.PropertySet";

offapi/com/sun/star/chart2/DataPointProperties.idl

@@ -20,6 +20,7 @@
 #define com_sun_star_chart2_DataPointProperties_idl
 
 #include <com/sun/star/beans/PropertySet.idl>
+#include <com/sun/star/drawing/FillProperties.idl>
 #include <com/sun/star/awt/Gradient.idl>
 #include <com/sun/star/style/XStyle.idl>
 #include <com/sun/star/drawing/Hatch.idl>
@@ -46,6 +47,15 @@ service DataPointProperties
     */
     service ::com::sun::star::beans::PropertySet;
 
+    /** to give access to the fill properties
+
+        Note that there is access for some of them
+        through some alias.
+
+        @since LibreOffice 5.1
+    */
+    service ::com::sun::star::drawing::FillProperties;
+
 
     /** points to a style that also supports this service (but not
         this property) that is used as default, if the PropertyState