Accessing to nonexistent nodes of storage model

[Tatiana Kholkina]

I faced the following trace in my watcher-decision-engine.log:

<email address hidden>#basic.madpool1a'] _get_by_name /opt/watcher/local/lib/python2.7/site-packages/watcher/decision_engine/model/model_root.py:441
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root [req-767d8f4f-1d8a-4347-b260-a044cd9de033 - - - - -] <email address hidden>#fast.madpool1-42833': KeyError: <email address hidden>#fast.madpool1-42833'
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root Traceback (most recent call last):
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root File "/opt/watcher/local/lib/python2.7/site-packages/watcher/decision_engine/model/model_root.py", line 445, in _get_by_name
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root return self.node[name]['attr']
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root File "/opt/watcher/local/lib/python2.7/site-packages/networkx/classes/reportviews.py", line 178, in __getitem__
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root return self._nodes[n]
2018-11-05 05:00:11.032 3820664 ERROR watcher.decision_engine.model.model_root KeyError: <email address hidden>#fast.madpool1-42833'

Looks like it tries to get node by volume_type name, not pool name.