Remove "msg" from tasks in ansible roles

It looks that 'msg' isn't valid attribute for a Task and
it cause problem with jobs which uses this role.

Change-Id: I43d09e645f60526d251703ce7ee91c29281f1eeb
Closes-Bug: #1820993

roles/fetch_journal_log/tasks/main.yaml

@@ -1,6 +1,5 @@
 - name: Ensure {{ journal_log_path }} exists
   become: yes
-  msg: "Ensure logdir {{ journal_log_path }} exists and have correct permission"
   file:
     path: "{{ journal_log_path }}"
     state: directory

roles/setup_logdir/tasks/main.yaml

@@ -1,6 +1,5 @@
 - name: Ensure logdir exists
   become: yes
-  msg: "Ensure logdir {{ logdir }} exists and have correct permission"
   file:
     path: "{{ logdir }}"
     state: directory