idempotence fix

tasks/system-rescue-cd.yml

@@ -16,6 +16,7 @@
     path: /mnt/sysrescucd
     fstype: iso9660
     state: mounted
+  changed_when: false
 
 - name: create folders for system-rescue-cd components in tftp
   file:
@@ -50,6 +51,7 @@
     path: /mnt/sysrescucd
     fstype: iso9660
     state: unmounted
+  changed_when: false
 
 - name: create autorun script repo for Ubuntu installation
   file: