core: taskcleaner.sh '-l' option does not prod...

Adding -L to the psql call to log command and its result.

Change-Id: Iee255ff5f929d795790088d5cf3475db0b81e04a
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1029177
Signed-off-by: Eli Mesika <emesika@redhat.com>