Restore fixed update example in example/load.py
Restore fixed update example in example/load.py

Earlier I'd misread the Scripting and Security page about inline scripts
- turns out they are enabled by default. Earlier failures I saw were due
  to old groovy syntax. Things are working after changing to painless.

elastic/elasticsearch-py,elastic/elasticsearch-py,brunobell/elasticsearch-py,brunobell/elasticsearch-py