Inspect fails if cannot find deployment

[kirillmakhonin]

This error occurs when k8s master data about services and deployments is out of sync.
Code tries to get information about deployment but it fails because it cannot find deployment and does not check it.

2018-09-07 05:33:59,264 - legion.http - ERROR - Exception during processing request for inspect: 'NoneType' object has no attribute 'status'
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/legion/http.py", line 161, in decorated_function
    response = method(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/legion/http.py", line 234, in decorated_function
    return method(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/legion/http.py", line 205, in decorated_function
    return method(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/legion/edi/server.py", line 279, in inspect
    model_api_ok, model_api_info
  File "/usr/local/lib/python3.6/dist-packages/legion/k8s/definitions.py", line 177, in build_from_model_service
    status=model_service.status,
  File "/usr/local/lib/python3.6/dist-packages/legion/k8s/services.py", line 391, in status
    if self.scale == 0:
  File "/usr/local/lib/python3.6/dist-packages/legion/k8s/services.py", line 313, in scale
    return self.deployment.status.available_replicas if self.deployment.status.available_replicas else 0
AttributeError: 'NoneType' object has no attribute 'status'