lint: all tasks should be named

Fix ansible-lint 502 error:

[502] All tasks should be named
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 97dd9218)

infrastructure-playbooks/purge-iscsi-gateways.yml

@@ -16,7 +16,8 @@
           "You have aborted the purge of the iSCSI gateway configuration"
       when: purge_config == 'abort'
 
-    - set_fact:
+    - name: set_fact igw_purge_type
+      set_fact:
         igw_purge_type: "{{ purge_config }}"
 
 - name: stopping the gateways

infrastructure-playbooks/rolling_update.yml

@@ -99,7 +99,9 @@
         - containerized_deployment | bool
         - ceph_docker_registry_auth | bool
 
-    - set_fact: rolling_update=true
+    - name: set_fact rolling_update
+      set_fact:
+        rolling_update: true
 
 - name: upgrade ceph mon cluster
   vars:

infrastructure-playbooks/shrink-rgw.yml

@@ -46,7 +46,8 @@
   become: true
   gather_facts: false
   tasks:
-    - setup:
+    - name: gather facts
+      setup:
         gather_subset:
           - 'all'
           - '!facter'