compatibility with haros update

[Anthony Remazeilles]

Runnning the model analysis with the docker:

docker run -p 4000:80 -ti haros:latest /haros_runner.sh https://github.com/aremazeilles/dummy_package.git dummy_package dummy_node

I get the following error:

[100%] Built target dummy_node
Traceback (most recent call last):
  File "/ros_model_extractor.py", line 207, in <module>
    main()
  File "/ros_model_extractor.py", line 202, in main
    if extractor.launch():
  File "/ros_model_extractor.py", line 78, in launch
    self.extract_primitives(node, parser.global_scope, analysis, rosmodel)
  File "/ros_model_extractor.py", line 91, in extract_primitives
    name = analysis._extract_topic(call)
AttributeError: 'NodeExtractor' object has no attribute '_extract_topic'

I am not sure when was updated the pip package of haros, but in the current version of file extractor.py, the requested method is now in classes RospyExtractor and RoscppExtractor

[Nadia Hammoudeh García]

closed, see #105 (comment) for further details.

Code also moved to ros-model-cloud, new issue -> ipa320/ros-model-cloud#35