Make roles to fetch and backup stratums to reduce duplicate code

roles/fetch-strata/tasks/main.yaml

@@ -0,0 +1,9 @@
+
+- name: Backup and remove old {{ strata }} strata
+  include_role:
+    name: backup-remove-strata
+
+- name: Fetch {{ strata }} strata
+  ansible.builtin.shell:
+    cmd: brl fetch {{ strata }}
+