Add __init__.py file to fix rpm builds

[AlanCoding]

I think I broke rpm builds. The install shows this:

[awx@ip-10-0-45-125 ~]$ ls /usr/lib/python3.8/site-packages/ansible_runner
cleanup.py  defaults.py    __init__.py   loader.py    output.py  __pycache__       runner.py     utils
config      exceptions.py  interface.py  __main__.py  plugins    runner_config.py  streaming.py

This is missing something very important! It doesn't have the awx_display folder with the callback plugin. For whatever reason, this seems to cause jobs to hang, which is worse than just failing.

I looked at the plugins folder, and it seems to get included with the blank file, so I want to follow suit in the obvious way here.

[AlanCoding]

I tried to run make rpm and it failed on

Step 5/5 : RUN pip3 install -IU ansible
 ---> Running in 62bfe8d9f751
WARNING: Running pip install with root privileges is generally not a good idea. Try `pip3 install --user` instead.
Collecting ansible
  Downloading https://files.pythonhosted.org/packages/fd/f8/071905c6a67592d0852a9f340f6ab9226861eeeb97fdf4068642b22edcf3/ansible-4.10.0.tar.gz (36.8MB)
Collecting ansible-core~=2.11.7 (from ansible)
  Downloading https://files.pythonhosted.org/packages/2a/3f/74189f84fc9a4a203fc9644cd62146ba735fd9dd17f94867a272075c3cc7/ansible-core-2.11.8.tar.gz (7.1MB)
Exception:
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python3.6/site-packages/pip/commands/install.py", line 346, in run
    requirement_set.prepare_files(finder)
  File "/usr/lib/python3.6/site-packages/pip/req/req_set.py", line 381, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python3.6/site-packages/pip/req/req_set.py", line 623, in _prepare_file
    session=self.session, hashes=hashes)
  File "/usr/lib/python3.6/site-packages/pip/download.py", line 821, in unpack_url
    hashes=hashes
  File "/usr/lib/python3.6/site-packages/pip/download.py", line 663, in unpack_http_url
    unpack_file(from_path, location, content_type, link)
  File "/usr/lib/python3.6/site-packages/pip/utils/__init__.py", line 615, in unpack_file
    untar_file(filename, location)
  File "/usr/lib/python3.6/site-packages/pip/utils/__init__.py", line 587, in untar_file
    with open(path, 'wb') as destfp:
UnicodeEncodeError: 'ascii' codec can't encode character '\xe9' in position 82: ordinal not in range(128)
The command '/bin/sh -c pip3 install -IU ansible' returned a non-zero code: 2
ERROR: Service 'rpm-builder' failed to build : Build failed
make: *** [Makefile:113: rpm] Error 1

[ansible-zuul]

LGTM!