install-chef-suse.sh: Move -e to the top
install-chef-suse.sh: Automate manual FROM_GIT steps

- Automate all the things!
  http://www.opscode.com/blog/2012/02/14/automate-all-the-things/
install-chef-suse.sh: Add --force to barclamp_install.rb when from Git

Otherwise the script somtimes bails, complaining about checksum errors,
when run multiple times during debugging/testing.
Merge pull request #1816 from jamestyj/jamestyj-install-chef-suse

Tweaks to install-chef-suse.sh