1103824: Add a catchall excepthook for rhsmd

To avoid ever having rhsmd having uncaught exceptions.
Move def'ing logging excepthook before inj init.

We just need logging setup to be useful, and lots
of things in init_dep_injection() can fail, so set
the excepthook_logging up before it.
Merge pull request #1086 from candlepin/alikins/rhsmd_excepthook

1103824: Add a catchall excepthook for rhsmd