Drop support for CentOS, test Rocky and Debian in CI (#92)

* Test CentOS 7 in CI

* Drop support for CentOS, test on Rocky and Debian

* Fix reset playbook for Rocky Linux

* Fix typo

* Disable firewalld during testing

Co-authored-by: Techno Tim <timothystewart6@gmail.com>

reset.yml

@@ -4,4 +4,10 @@
   gather_facts: yes
   become: yes
   roles:
+    - role: raspberrypi
+      vars: {state: absent}
     - role: reset
+  post_tasks:
+    - name: Reboot and wait for node to come back up
+      reboot:
+        reboot_timeout: 3600