stopping chown commands in post gen hook

with our current sshfs mount, a user / group can't be set on the wikis.
This might change when we move to NFS next year.

hooks/post_gen_project.sh

@@ -3,10 +3,10 @@
 mv /tmp/cookiecutter/{{cookiecutter.directory_name}}/nginx_example_moin_{{cookiecutter.directory_name}} /etc/nginx/sites-available/nginx_example_moin_{{cookiecutter.directory_name}}
 
 mv /tmp/cookiecutter/{{cookiecutter.directory_name}}/{{cookiecutter.directory_name}}.py /var/www/moin/config/{{cookiecutter.directory_name}}.py
-chown www-data:www-data /var/www/moin/config/{{cookiecutter.directory_name}}.py
+chown www-data:www-data /var/www/moin/config/{{cookiecutter.directory_name}}.py 2>/dev/null
 
 mv /tmp/cookiecutter/{{cookiecutter.directory_name}} /var/www/moin/wikis/{{cookiecutter.directory_name}}
-chown -R www-data:www-data /var/www/moin/wikis/{{cookiecutter.directory_name}}
+chown -R www-data:www-data /var/www/moin/wikis/{{cookiecutter.directory_name}} 2>/dev/null
 
 rm -rf /tmp/cookiecutter