Update roles in site manifest

1. remove roles that we are not going to deploy.

We have plenty of roles to maintain without making up new ones.

2. don't deploy ceph profiles on controllers

b/c it doesn't work yet

3. add the actual storage roles

- st (osd only)
- stmon (osd + mon)
- stmonleader (osd + mon leader)
Merge pull request #83 from bodepd/fix_site_manifest

Update roles in site manifest