text: Title: Distributed LDA Connection refused - Dispatcher host is always 127.0.0.1
  Body: ## Problem description
  
  I am trying to run the distributed LDA on multiple machines. Following this tutorial: https://radimrehurek.com/gensim/models/lda_worker.html
  
  Setup is working but once I run the distributed lda I get the following error:
  ![error](https://user-images.githubusercontent.com/963798/71465376-c0c9b180-27bc-11ea-9bab-ce061f33a424.PNG)
  
  Dispatcher worker recognizes that there are lda-workers available but they cannot connect to the dispatcher.
  
  ![gensim](https://user-images.githubusercontent.com/963798/71465420-e8207e80-27bc-11ea-83df-17a063fcbe89.PNG)
  
  The dispatcher host is always 127.0.0.1
  
  I have also tried setting the host ip on the dispatcher but no luck
  ```
  python -m gensim.models.lda_dispatcher --host HOST_IP &
  ```
  
  Nameserver is recognized on other machines and shows the correct ip.