ceph.spec.in: loosen ceph-test's dependencies

ceph.spec.in: loosen ceph-test's dependencies

In Debian, the ceph-test package can be installed with any version of
ceph-common.

Prior to this commit, in RHEL, we're much more strict about which
version of the dependencies we require. We depend directly on
librados2/librbd1/libcephfs1 instead of ceph-common, and we also require
the specific versions of these libraries to match the version of
ceph-test.

For testing Ceph, it is nice to have the ability to upgrade the
librados2/librbd1/libcephfs1 libraries on a host without having to also
upgrade the ceph-test package as well.

Remove the version number requirements, and change the dependencies from
librados2/librbd1/libcephfs1 to simply "ceph-common". That will make
/etc/ceph/ and /var/log/ceph present for the tests.

http://tracker.ceph.com/issues/10989 Refs: #10989

Signed-off-by: Ken Dreyer <kdreyer@redhat.com>