Check for is_atomic when uninstalling flannel package.

playbooks/adhoc/uninstall.yml

@@ -74,7 +74,7 @@
 
   - name: Remove flannel package
     action: "{{ ansible_pkg_mgr }} name=flannel state=absent"
-    when: openshift_use_flannel | default(false) | bool
+    when: openshift_use_flannel | default(false) | bool and not is_atomic | bool
 
   - shell: systemctl reset-failed
     changed_when: False