QgsSymbolLayerV2 class has been modified to convert into SubClass as needed
- A test is provided for check subclasses binding and behaviour
- A fix has been done for src\core\symbology-ng\qgsellipsesymbollayerv2.cpp because of an error in createFromSld about fillColor
Signed-off-by: endmax <massimo.endrighi@geopartner.it>
