change oci yum region condition check

Author: bgraef

ocne2/create_instance.yml

@@ -301,7 +301,7 @@
         dest: /etc/yum/vars/ociregion
         mode: '0644'
       become: true
-      when: oci_yum_region | default(omit) | length > 0
+      when: oci_yum_region is defined and oci_yum_region | length > 0
 
 - name: Update all rpm packages
   ansible.builtin.import_playbook: update_all_rpms.yml

ol/create_instance.yml

@@ -301,7 +301,7 @@
         dest: /etc/yum/vars/ociregion
         mode: '0644'
       become: true
-      when: oci_yum_region | default(omit) | length > 0
+      when: oci_yum_region is defined and oci_yum_region | length > 0
 
     - name: Configure passwordless SSH
       ansible.builtin.include_tasks: "passwordless_setup.yml"