packages: ovirt: drop ltrace installation

ltrace is a component of development packages installed in the past at
rhel <= 5.

It will not be installed any more as far since ovirt-3.0 on fedora >= 16
or rhel >= 6

Change-Id: I31244b640cca9ad84a6ab06acc82b1e198c89165
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>