Resolve "wrong use of systemd templates for validation cleanup service"

Fixes #1 (closed)-wrong-use-of-systemd-templates-for-validation-cleanup-service

Proposed Changes

• use %i in systemd timer declaration to make sure that the correct service is called when the timer triggers
• create multiple timers through loop in Ansible task to make sure that every service has an affiliated timer that it's triggered by

tasks/install_validation_tools.yml

@@ -54,6 +54,7 @@
     src: "{{ item.s | default(omit) }}"     # file to link to
     dest: "/usr/local/etc/{{ item.d }}"    # symlink file path
     state: "{{ item.state | default('link') }}"
+    mode: "{{ item.m | default(omit) }}"
   loop:
     # TIFF 6
     - d: "cit_tiff6_baseline_SLUB_current.cfg"