Roll back f19bc7ea70747934a7765411234950bc6c023a81

Commit f19bc7ea70747934a7765411234950bc6c023a81 is busted in multiple
ways.  It contained a malformed patch and breaks remediation.  Roll it
back.
Ask users for repo paths in bootstrap.sh
Fix host dep checks in Makefile.

They weren't actually causing a fatal error when they should have been.
Add additional constraints on user_u in selinux policy
Spawn createrepo workers based on num of cores.

RHEL 6 has worker threads in createrepo.  Start using them.