core: Webadmin - Events - Search box...

Webadmin - Events - Search box: filtering events by time shows bogus results

Change-Id: I9c6e1084553e7755849d4d3162fe58ea3f0018c7
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1025295
Signed-off-by: Eli Mesika <emesika@redhat.com>