Fix cephcsi image override

Author: bastjan

class/defaults.yml

@@ -263,7 +263,8 @@ parameters:
         enableGrpcMetrics: true
         enableLiveness: true
         cephcsi:
-          image: ${rook_ceph:images:cephcsi:registry}/${rook_ceph:images:cephcsi:image}:${rook_ceph:images:cephcsi:tag}
+          repository: ${rook_ceph:images:cephcsi:registry}/${rook_ceph:images:cephcsi:image}
+          tag: ${rook_ceph:images:cephcsi:tag}
       pspEnable: false
 
     toolbox: