increase fault tolerancy for the master playbook

add units apt packages

library/rescue_role.yml

@@ -0,0 +1,8 @@
+# https://stackoverflow.com/a/55524120
+- name: Rescue role
+  block:
+    - include_role:
+        name: "{{ item_my_role }}"
+  rescue:
+    - set_fact:
+        failed_roles: "{{ failed_roles|default([]) + [ item_my_role ] }}"