Fix test run on RHEL8 nftables vs iptables

molecule/default/molecule.yml

@@ -5,20 +5,21 @@ driver:
   name: docker
 platforms:
   - name: rhel8
-    image: docker.io/pycontribs/centos:8
+    image: mycent8-builder:latest
+    #dockerfile: Centos8-Dockerfile
     privileged: True
     volume_mounts:
       - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
     command: "/usr/sbin/init"
     pre_build_image: true
   - name: rhel7
-    image: docker.io/pycontribs/centos:7
-    dockerfile: Centos7-Dockerfile
+    image: mycent7-builder:latest
+    # dockerfile: Centos7-Dockerfile
     privileged: True
     volume_mounts:
       - "/sys/fs/cgroup:/sys/fs/cgroup:rw"
     command: "/usr/sbin/init"
-    pre_build_image: false
+    pre_build_image: true
 provisioner:
   name: ansible
 verifier: