Kafo

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1084574
Description of problem:
When a non-root/privileged user tries to run katello-installer, a stack is thrown. This should probably be cleaned up just slightly to inform user that they must have administrative rights.

Version-Release number of selected component (if applicable):
Satellite-6.0.3-RHEL-6-20140403.0

How reproducible:

Steps to Reproduce:
1. create a non-root user and su <user>
2. katello-installer --help
3. view results

Actual results:
/usr/lib/ruby/1.8/fileutils.rb:1036:in `utime': Permission denied - /etc/katello-installer/katello_installer.yaml (Errno::EACCES)
from /usr/lib/ruby/1.8/fileutils.rb:1036:in `touch'
from /usr/lib/ruby/1.8/fileutils.rb:1033:in `each'
from /usr/lib/ruby/1.8/fileutils.rb:1033:in `touch'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/configuration.rb:46:in `save_configuration'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/configuration.rb:53:in `configure_application'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/configuration.rb:30:in `initialize'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/kafo_configure.rb:34:in `new'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/kafo_configure.rb:34:in `initialize'
from /usr/lib/ruby/gems/1.8/gems/clamp-0.6.2/lib/clamp/command.rb:125:in `new'
from /usr/lib/ruby/gems/1.8/gems/clamp-0.6.2/lib/clamp/command.rb:125:in `run'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/kafo_configure.rb:98:in `run'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/kafo_configure.rb:97:in `catch'
from /usr/lib/ruby/gems/1.8/gems/kafo-0.3.16/lib/kafo/kafo_configure.rb:97:in `run'
from /usr/sbin/katello-installer:8

Expected results:

Something informing that this must be run as a root/admin user

Additional info:
Note that providing --help access is not recommended for non-root users since secret keys are displayed in help... and we're fine here. Would just like to clean up output a bit. Minor bz.