CI: fix two ansible-lint warnings

Signed-off-by: Sven Kieske <kieske@osism.tech>
Change-Id: I81a9b2dab7e9a4e2c8facaa0f32538f2884e3ca9

ansible/roles/cinder/tasks/precheck.yml

@@ -59,7 +59,7 @@
   assert:
     that:
       - vars[item] is defined
-    msg: "Cinder backup S3 backend is enabled, either the {{ item }} or {{ item | replace('cinder_backup_','') }} variable must be defined."
+    msg: "Cinder backup S3 backend is enabled, either the {{ item }} or {{ item | replace('cinder_backup_', '') }} variable must be defined."
   with_items:
     - cinder_backup_s3_url
     - cinder_backup_s3_bucket

ansible/roles/glance/tasks/precheck.yml

@@ -29,7 +29,7 @@
   assert:
     that:
       - vars[item] is defined
-    msg: "Glance S3 backend is enabled, either the {{ item }} or {{ item | replace('glance_backend_','') }} variable must be defined."
+    msg: "Glance S3 backend is enabled, either the {{ item }} or {{ item | replace('glance_backend_', '') }} variable must be defined."
   with_items:
     - glance_backend_s3_url
     - glance_backend_s3_bucket