Debian: Fixed banner error message

When logging, a message would show saying
"-sh: The: command not found"

This was due to a warning message that was being added
to /etc/bash_completion.d/openstack when the command
"openstack complete" is executed to fill the file.

Added a "-q" flag to suppress the warning message.

Test Plan:
PASS normal banner when logging
PASS file does not contain the warning message
PASS bootstrap and unlock

Closes-Bug: 1978493

Signed-off-by: Leonardo Fagundes Luz Serrano <Leonardo.FagundesLuzSerrano@windriver.com>
Change-Id: Ie935ae2c32e644cd6bc622046319adfb90d6477e

puppet-manifests/src/modules/platform/manifests/client.pp

@@ -26,7 +26,7 @@ class platform::client
   -> file {'/etc/bash_completion.d/openstack':
     ensure  => 'present',
     mode    => '0644',
-    content => generate('/usr/bin/openstack', 'complete'),
+    content => generate('/usr/bin/openstack', 'complete', '-q'),
   }
 
   if $::personality == 'controller' {