rpm: 95-ceph-osd-alt.rules is not needed for centos7 / rhel7 (firefly)

The || instead of && had it always installed. That was fixed in EPEL
already.

http://tracker.ceph.com/issues/9747 Fixes: #9747

Signed-off-by: Loic Dachary <loic-201408@dachary.org>
(cherry picked from commit 5ff4a850a0d809b3f25988c6cceb82c35095ef84)