assorted patches

Assorted patches.

-- 
David Cantrell <dcantrell redhat com>
Red Hat, Inc. / Honolulu, HI

Follow-Ups:
- [PATCH 1/9] Remove unused self._resize variable.
  - From: David Cantrell
- [PATCH 2/9] Do not write /etc/hosts since setup owns that now (#491808)
  - From: David Cantrell
- [PATCH 3/9] Do not prompt for NIC selection in cmdline mode (#492586)
  - From: David Cantrell
- [PATCH 4/9] Require libselinux-python (#489107)
  - From: David Cantrell
- [PATCH 5/9] Correct bounds checking problems in 'Shrink current system'
  - From: David Cantrell
- [PATCH 6/9] Move _scheduleLVs and growLVM calls to be inside try/except
  - From: David Cantrell
- [PATCH 7/9] Fix typo in upgrade.py
  - From: David Cantrell
- [PATCH 8/9] Fix problem with format and migrate combo box activation.
  - From: David Cantrell