bump omnibus-ruby and omnibus-software

- omnibus-ruby: solaris builds using pkgmk instead of fpm
- omnibus-ruby: support for tar.xz files (unused in omnibus-chef)
- omnibus-ruby: support for pre-install scripts (unused in omnibus-chef)
- omnibus-ruby: bump default ncpus to 3 and jobs to 2 (build parallelism)
- omnibus-software: chef windows/unix gemspec split
- omnibus-software: /opt/chef/bin/ohai missing fix
- omnibus-software: ENV['OHAI_GIT_REV'] support
- omnibus-software: numerous aix fixes
- omnibus-software: make -j everywhere
only install the windows gem on windows

- we build both now due to the split gemspec, need to only install
  the windows version
numerous fixes for install scripts

- conditionally setup symlinks for chef-10-vs-chef-11
- syntax fixes for solaris
test for symlink presence

nothing else in the infrastructure tests for the symlinks getting
setup correctly, so we do that here.

- we clean up the symlinks from the previous install which may have
  been left behind due to bad/missing/whatever postremove scripts
- we test for the presence of the symlinks after installing the
  package
- for now only test for the ones in common
Merge pull request #92 from opscode/OC-8537

Oc 8537
New opscode logo for windows msi installation.
Merge pull request #94 from opscode/OC-10052

New opscode logo for windows msi installation.
Update Vagrantfile to use Opscode's provisioner-less base boxes
bump omnibus for solaris pkgmk fix
bump omnibus
bump omnibus
Merge pull request #96 from opscode/OC-8537

Oc 8537
clean up old MSIs on windows boxes
do an uninstall before an install

- the fact that this works when you're pointing at a package that
  isn't the same package that was installed, and technically could both
  be installed at the same time, hurts my brain, but it does appear
  to work.  windows is strange.
- if we don't do this we can wind up in a broken state with msis
  installed and when we run the first time we magically seem to get
  the old package re-wired up (again, hurts my brain), but the
  uninstall at the end fixes things so the second time through it will
  work.  by uninstalling here it should clean up old broken installs
  without needing a double-run.
- ow ow ow ow my brain hurts.
Merge pull request #95 from opscode/update-baseboxes

Update Vagrantfile to use Opscode's provisioner-less base boxes
move uninstall earlier
Merge pull request #97 from opscode/OC-8537

Oc 8537
convert bash to sh in scripts

- cannot rely on bash being installed on AIX
- the packaging scripts on solaris are already run under /bin/sh
  and there is no control over this (shebang is clearly ignored).
removing bashisms

used http://sourceforge.net/projects/checkbaskisms/
comment out berks