General cleanup for Duplicate Provides, but found lots of other issues
    in the spec file:
    - let base package include all its documentation files via %doc magic,
      so for Fedora 20 Unversioned Docdirs no files are included accidentally
    - include the sample config files again (instead of just an empty docdir
      that has been added for #846735)
    - don't include librbd.so.1 also in -devel package (#1003202)
    - move one misplaced rados plugin from -devel into -libs package (#891993)
    - include missing directories in -devel and -libs packages
    - move librados-config into the -devel pkg where its manual page is, too
    - add %_isa to subpackage dependencies
    - don't use %defattr anymore
    - add V=1 to make invocation for verbose build output