change tests to use faketime

change tests to use faketime

We only have the month, day, hours, minutes and seconds available to us,
but not the year. Because of this we assume the logs are always relative
to the current year. This means when running the log tracker the CTIME
is calculated based on the current year and once a new year starts, all
old tests have to be updated to match the new year.

To work around this issue, use 'faketime' to set the time to 2020-12-31
23:59:59 as all tests assume 2020 as the year.

Signed-off-by: Mira Limbeck <m.limbeck@proxmox.com>
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>