Stop double compressing pdns logs
Stop double compressing pdns logs

This patch changes the powerDNS log collection to stop double compressing the log archive. The designate role compressed the log file and the zuul role also compresses the file.
This will allow the powerDNS logs to be directly viewable via the zuul logs page.

Change-Id: Ic86b8637e00525037b1c7735f9909d83397593a2

openstack/designate,openstack/designate,openstack/designate