Bug 16039: Added -q flag to share_usage_with_koha_community.pl

 Bug 16039: Added -q flag to share_usage_with_koha_community.pl

To test:

With UsageStats syspref set to No:

* run misc/cronjobs/share_usage_with_koha_community.pl
  (without -q)
  - "The UsageStats system preference is not set." message
    with usage info should be output

* run misc/cronjobs/share_usage_with_koha_community.pl -q
  - the output should be quiet

NOTE: See comment #7.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>