title: CQL Engine Exception about a connection name not existing in registry
body: <p>I get the following exception while trying to connect to a Cassandra DB using a Python Cassandra-Driver client running on Windows 2012 Server R2 - 64 bit. I could get this working on my personal laptop but not a machine that is hosted on Azure. I am sure I am missing some dependencies but just unsure about what they are.</p>
  
  <p>File "C:\Python\Python35-32\lib\site-packages\cassandra\cqlengine\connection.py", line 190, in get_connection    raise CQLEngineException("Connection name '{0}' doesn't exist in the registry.".format(name)) Cassandra.cqlengine.CQLEngineException: Connection name '' doesnt exist in the registry.</p>