tool-tests: use variable from conf version in template files.

Replace LATEST_CONF_VERSION with current value from libvirt configure.

This will save having to update all toolTests_*.conf files each
time we bump a version.

Change-Id: I1f322cc647f81358febbcb89b8ec67fd2a2b2270
Signed-off-by: Mooli Tayer <mtayer@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/32713
Reviewed-by: Yaniv Bronhaim <ybronhei@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>