[stable-2.7] Pin the ansible-runner version in tests.

The tests need to be updated to support newer ansible-runner releases.
(cherry picked from commit 777b726e4f)

Co-authored-by: Matt Clay <matt@mystile.com>

test/integration/targets/ansible-runner/tasks/setup.yml

@@ -5,6 +5,7 @@
 - name: Install ansible-runner
   pip:
     name: ansible-runner
+    version: 1.2.0
 
 - name: Find location of ansible-runner installation
   command: "'{{ ansible_python_interpreter }}' -c 'import os, ansible_runner; print(os.path.dirname(ansible_runner.__file__))'"