Revert "Install SELinux packages asynchronously"
This reverts commit 5085d45d7b055da55b8eedba6d682cfedd6e6a57.
Installing packages in the background doesn't seem so stable since
sometimes we observe problems like the following one:
==> centos7: TASK [lxc_hosts : Ensure SELinux distro packages have finished installing] *****
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (30 retries left).
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (29 retries left).
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (28 retries left).
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (27 retries left).
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (26 retries left).
==> centos7: FAILED - RETRYING: Ensure SELinux distro packages have finished installing (25 retries left).
...
==> centos7: fatal: [localhost]: FAILED! => {"ansible_job_id": "350629830198.20986", "attempts": 30, "changed": false, "finished": 0, "started": 1}
==> centos7: to retry, use: --limit @/vagrant/tests/test.retry
As such, lets revert the change and install them in the normal way.
Change-Id: I6e6a890f2fa98e9874597b69e4caf2dfd78182f4
efd03ccda7