fix(sync): centreon_central_sync did not log anything, even errors (#12)
fix(sync): centreon_central_sync did not log anything, even errors (#12)

centreon_central_sync does not log anything by default, even when it is not able to connect to the secondary node.
This was due to a mis-use of our common `backtick` function.
centreon/centreon,centreon/centreon,centreon/centreon,centreon/centreon,centreon/centreon,centreon/centreon,centreon/centreon