ceph.spec.in, init-ceph.in: Don't autostart ceph service on Fedora.

ceph.spec.in, init-ceph.in: Don't autostart ceph service on Fedora.

This patch is taken from the current Fedora package and makes the upstream
ceph.spec compliant with Fedora policy. The goal is to be fully compliant
upstream so that we can replace current Fedora package with upstream
package to fix many bugs in Fedora.

Addition from Dan Mick <dan.mick@inktank.com>:
Do this for RHEL and Centos as well, since they surely will benefit
from the same policy.   Note: this requires changes to
autobuild-ceph and ceph-build scripts, which currently copy
only the dist tarball to the rpmbuild/SOURCES dir.

Signed-off-by: Erik Logtenberg <erik@logtenberg.eu>
Signed-off-by: Dan Mick <dan.mick@inktank.com>:
(cherry picked from commit 461523b06cdf93e32f1d8b354ac3799e73162d33)