[FEATURE][CONF] Fully implemented GetStoredProcedureName, modified classes

Method GetStoredProcedureName has been fully implemented in the Inventory class.

The constants (enum) have been moved from the AbstractInventory class to the Inventory class.

Deprecated method GetDesktops in the AbstractInventory class has been removed and GetDesktops2 has been moved to the Inventory class and renamed to GetDesktops.