title: ObjectDetecionAPI TypeError: __new__() got an unexpected keyword argument 'serialized_options'
body: <p>I did everything it says at <a href="https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md" rel="nofollow noreferrer">https://github.com/tensorflow/models/blob/master/research/object_detection/g3doc/installation.md</a> and lastly updated my protoc. When i enter <code>$ protoc --version</code>, it throws libprotoc 3.5.1 on the terminal. But when i try to do <code>$ python object_detection/builders/model_builder_test.py</code>, it throws an error TypeError: _ <em>new</em> _() got an unexpected keyword argument 'serialized_options'. What am i doing wrong?</p>