We need to be root to read the certificates that give access to the
package repos. Right now, the alternative seems to be changing
permissions on the certs themselves, which seems less good. We're
running anaconda as root anyway.
A bad system repo can cause lorax-composer to fail to start. Instead of
a traceback log the error and exit.
(note that the exit still results in an OSError traceback due to part of
it running as root, this needs to be addressed in another commit).
(cherry picked from commit 49380b4b49)
Depsolve the packages included in the templates and report any errors
using the /api/status 'msgs' field. This should help narrow down
problems with package sources not being setup correctly.
(cherry picked from commit d92f2f5b04)
