fix: set correct permissions for Oracle backup directory to enable access for sanitytest server

tasks/oracle/configure_rman_backup.yml

@@ -4,7 +4,7 @@
     path: "/var/log/backup/{{ vault_oracle_user }}/"
     owner: "{{ vault_oracle_user }}"
     group: "{{ vault_oracle_group }}"
-    mode: "0750"
+    mode: "0755"        # set o+rx, because it's needed for sanitytests
     state: directory
 
 - name: install the other backup scripts from files