engine: reduced logging in Even distribution policy

Change-Id: I99d7492bba98670027dbb5b13e2290bf84510ec1
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1126839
Signed-off-by: Jiri Moskovcak <jmoskovc@redhat.com>
(cherry picked from commit 7f74698b81b55156d9d779e9aff248cdf5064709)