Fix odsc-west tutorial

Note: mandatory check (NEED_CHECK) was skipped ref:868077618033c3f595516887fa6fd060fa1b3ce6

Author: nikitxskv

events/2019_10_30_odsc_west.ipynb

@@ -337,7 +337,7 @@
  "source": [
  "model = CatBoostClassifier(\n",
  " iterations=15,\n",
- " verbose=5,\n",
+ "#  verbose=5,\n",
  ")\n",
  "model.fit(train_pool, eval_set=validation_pool);"
  ]
@@ -867,7 +867,7 @@
  "source": [
  "model.get_feature_importance(\n",
  " validation_pool, \n",
- " 'LossFunctionChange', \n",
+ " 'LossFunctionChange',\n",
  " prettified=True\n",
  ")"
  ]