Make ansible-lint happy

[britthouser]

Ansible-lint through a couple warnings when run against
this role. I udpated the two warnings, and also raised
the minimum ansible version required for the systemd change.

[britthouser]

@aprt5pr - with this change, ansible-lint could be added as another gate check as well.

[aprt5pr]

@britthouser the tests are failing for both CentOS and Ubuntu. Let's see if we can sort that out before merging this.

[britthouser]

Sounds good @aprt5pr. I just rebased this on top of #5 . Hopefully that will fix CentOS gate. I'm not sure what is wrong with Debian gate.

[britthouser]

Yeah it looks like CentOS gate is happy now, but the Ubuntu gate is giving this error:

TASK [lansible-role-ocserv : Start and enable Ocserv] **************************
fatal: [localhost]: FAILED! => {"changed": false, "cmd": "/bin/systemctl", "msg": "Failed to connect to bus: No such file or directory", "rc": 1, "stderr": "Failed to connect to bus: No such file or directory\n", "stderr_lines": ["Failed to connect to bus: No such file or directory"], "stdout": "", "stdout_lines": []}

I wonder if this is an issue due to running in a container rather than VM?