message: For python tests launch sandbox node with just Irmin
diff: @@ -150,6 +150,9 @@ class Sandbox:
  # TODO: FIX THIS IN TEZEDGE
  params = params + ['--private-node', 'true']
  params = params + ['--network=sandbox']
  + # NOTE: The TezEdge in-memory context doesn't survive restarts,
  + # and some tests require that, disable for now.
  + params = params + ['--tezos-context-storage=irmin']
  peers_rpc = [self.p2p + p for p in peers]
  node_bin = self._wrap_path(NODE, branch)
  node = Node(
  