Suppress rsync warnings w/command

Ansible throws warnings when we use rsync with the command
module. This patch suppresses those warnings.

Depends-On: I3acc4436c8b70af097de188b9de2bb9f4e093a09
Change-Id: I42652318f128120b1ecec4781066c89ee9023636
(cherry picked from commit 20801aa010)

tasks/swift_rings_distribute.yml

@@ -25,6 +25,8 @@
     rsync -e 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
           -avz {{ swift_system_user_name }}@{{ hostvars[groups['swift_hosts'][0]]['ansible_host'] }}:/etc/swift/ring_build_files/
           /etc/swift/
+  args:
+    warn: no
   become: yes
   become_user: "{{ swift_system_user_name }}"
   changed_when: false
@@ -38,6 +40,8 @@
     rsync -e 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
           -avz {{ swift_system_user_name }}@{{ hostvars[groups['swift_hosts'][0]]['ansible_host'] }}:/etc/swift/ring_build_files/
           /etc/swift/ring_build_files/
+  args:
+    warn: no
   become: yes
   become_user: "{{ swift_system_user_name }}"
   changed_when: false