Support installing ceph kernels from gitbuilder on rpm machines.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>
Remove unused variables and functions.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>
Added requested comment.

Signed-off-by: Sandon Van Ness <sandon@inktank.com>