Convert docker molecule usage to podman

This change updates all uses of docker to podman and removes our docker
installation process from zuul and our local test process. Some container
based tests have been moved to "delegated" becuase they no longer make
sense to run in a container and the hacks needed to maintain the container
based testing are not worth maintaining for podman.

Change-Id: I02de94a1229bfa847f14ecf282eadbcfe6396875
Signed-off-by: Kevin Carter <kecarter@redhat.com>

tripleo_ansible/roles/tripleo_ptp/molecule/default/molecule.yml

@@ -1,6 +1,6 @@
 ---
 driver:
-  name: docker
+  name: podman
 
 log: true
 
@@ -16,15 +16,13 @@ platforms:
       http_proxy: "{{ lookup('env', 'http_proxy') }}"
       https_proxy: "{{ lookup('env', 'https_proxy') }}"
     command: /sbin/init
-    tmpfs:
-      - /run
-      - /tmp
     capabilities:
-      - ALL  # CENT7 requires all due to the age of the software
+      - ALL
     volumes:
-      - /run/udev:/run/udev:ro
-      - /sys/fs/cgroup:/sys/fs/cgroup:ro
       - /etc/ci/mirror_info.sh:/etc/ci/mirror_info.sh:ro
+    privileged: true
+    ulimits: &ulimit
+      - host
 
   - name: centos8
     hostname: centos8
@@ -35,16 +33,12 @@ platforms:
       http_proxy: "{{ lookup('env', 'http_proxy') }}"
       https_proxy: "{{ lookup('env', 'https_proxy') }}"
     command: /sbin/init
-    privileged: true
-    tmpfs:
-      - /run
-      - /tmp
     capabilities:
-      - SYS_ADMIN
+      - ALL
     volumes:
-      - /run/udev:/run/udev:ro
-      - /sys/fs/cgroup:/sys/fs/cgroup:ro
       - /etc/ci/mirror_info.sh:/etc/ci/mirror_info.sh:ro
+    privileged: true
+    ulimits: *ulimit
 
 provisioner:
   name: ansible