Use step condition for all upgrade tasks

upgrade_tasks need to use "when: step|int == [0-6]"
for all tasks. This is a regression from [1].

[1] https://review.opendev.org/c/openstack/tripleo-heat-templates/+/852304

Change-Id: Id15a719201889771a464b6a26dc4c6e1ac26a5d7

deployment/snmp/snmpd-disabled-puppet.yaml

@@ -78,6 +78,8 @@ outputs:
             name: snmpd
             state: stopped
         - name: Uninstall net-snmp
+          when:
+            - step|int == 1
           package:
             name: net-snmp
             state: absent