If image is not found in VM directory look in images folder

gns3server/modules/base_manager.py

@@ -386,7 +386,16 @@ class BaseManager:
         img_directory = self.get_images_directory()
         if not os.path.isabs(path):
             s = os.path.split(path)
-            return os.path.normpath(os.path.join(img_directory, *s))
+            path = os.path.normpath(os.path.join(img_directory, *s))
+
+            # Compatibility with old topologies we look in parent directory
+            # We look at first in new location
+            if not os.path.exists(path):
+                old_path = os.path.normpath(os.path.join(img_directory, '..', *s))
+                if os.path.exists(old_path):
+                    return old_path
+
+            return path
         return path
 
     def get_relative_image_path(self, path):