ceph.spec: Clean up and fix spec file and build for a couple of distributions

ceph.spec: Clean up and fix spec file and build for a couple of distributions

Clean up and fix the spec file. This includes cleaning up of build and
installed system dependencies, LSB compliance fixes, splitting up into
several sub-packages (lib*) and so on. It now builds fine for the
following distributions in the Open Build Service and should be
considered as a starting point for further fixes:

 - CentOS 6
 - Fedora 15
 - RedHat Enterprise Linux 6
 - openSUSE 11.4
 - openSUSE 12.1
 - openSUSE Factory
 - SUSE Linux Enterprise 11 (SP1 and SP2)

Signed-off-by: Holger Macht <hmacht@suse.de>