ceph.spec.in: fix lttng/babeltrace conditionals

ceph.spec.in: fix lttng/babeltrace conditionals

lttng and babeltrace are build dependencies for rbd-replay-prep. Make
sure the right package names are used. Enable for SLE12, as well as
for openSUSE 13.1 and higher.

Move the BuildRequires out of the ceph-test subpackage and into the
distro-conditional dependencies section.

Make ordering of BuildRequires a little more alphabetical.

http://tracker.ceph.com/issues/12360 Fixes: #12360

Signed-off-by: Nathan Cutler <ncutler@suse.com>
sqme