get_packages_name returns filter object, should return list

[pgagne]

Looks like we need to update this for python 3

Traceback (most recent call last):
  File "/home/jenkins/shiningpanda/jobs/c63d637c/virtualenvs/d41d8cd9/lib/python3.6/site-packages/fabric/main.py", line 763, in main
    *args, **kwargs
  File "/home/jenkins/shiningpanda/jobs/c63d637c/virtualenvs/d41d8cd9/lib/python3.6/site-packages/fabric/tasks.py", line 387, in execute
    multiprocessing
  File "/home/jenkins/shiningpanda/jobs/c63d637c/virtualenvs/d41d8cd9/lib/python3.6/site-packages/fabric/tasks.py", line 277, in _execute
    return task.run(*args, **kwargs)
  File "/home/jenkins/shiningpanda/jobs/c63d637c/virtualenvs/d41d8cd9/lib/python3.6/site-packages/fabric/tasks.py", line 174, in run
    return self.wrapped(*args, **kwargs)
  File "/home/jenkins/workspace/satellite6-RCM-compose/automation_tools/utils.py", line 159, in compare_builds
    list1.sort()
AttributeError: 'filter' object has no attribute 'sort'