if no groups were found, the task log was very confusing as it
contained no real information why nothing was synced, e.g.:
Starting datastore sync job 'remote:datastore:local-datastore:s-79412799-e6ee'
Sync datastore 'local-datastore' from 'remote/datastore'
sync job 'remote:datastore:local-datastore:s-79412799-e6ee' end
TASK OK
this patch simply logs how many groups were found and are about to be synced:
Starting datastore sync job 'remote:datastore:local-datastore:s-79412799-e6ee'
Sync datastore 'local-datastore' from 'remote/datastore'
found 0 groups to sync
sync job 'remote:datastore:local-datastore:s-79412799-e6ee' end
TASK OK
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>