message: updates load_examples to load-examples
diff: @@ -436,7 +436,7 @@ superset db upgrade
  superset init
  # Load some data to play with
  -superset load_examples
  +superset load-examples
  # Start the Flask dev web server from inside your virtualenv.
  # Note that your page may not have css at this point.
  @@ -747,7 +747,7 @@ export ENABLE_REACT_CRUD_VIEWS=true
  export CYPRESS_BASE_URL="http://localhost:8081"
  superset db upgrade
  superset load_test_users
  -superset load_examples --load-test-data
  +superset load-examples --load-test-data
  superset init
  superset run --port 8081
  ```
  