Fix warning: use file module with owner instead of chown
Fix warning: use file module with owner instead of chown

Replace command with file modules, to address the following warning
in ansible/roles/ovn/tasks/config.yml:

 [WARNING]: Consider using file module with owner rather than running chown

openvswitch/ovn-scale-test,sivakom/ovn-scale-test,sivakom/ovn-scale-test,openvswitch/ovn-scale-test