Issue #37: Add newest lorax source to packages

This fixes issue #37 which would cause a build to fail if a build was
previously executed, and the artifacts from that build were not deleted.
Issue #37: Patch lorax source

Before we were patching lorax directly on the system with a patch in
support. Now we patch the source, and then install the newest RPM.

We will also drop the old patch from support.
Issue #37: Build and install our own lorax in bootstrap

Remove lorax from list of RPMs to install using RHN in bootstrap and
the top Makefile. We now install the newest lorax as part of the
bootstrap process.
Issue #37: Add more optional packages needed by lorax

Added at-spi, tigervnc-server-module, and bitmap-fangsongti-fonts to
bootstrap. These packages will no longer spew out an error during a
build because they were missing. There is still and error for
*-redhat-upgrade-dracut, but this is documented in
https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=1065557.
Since this package is not yet available, but will soon be added, it
should not be removed.

Removed rpm-ostree and kexec-tools-anaconda-addon from the lorax templates.
We don't use these packages and it silences some errors during the build.

Run createrepo on the opt repo each time we bootstrap. This needs to be
done because a new RPM might be added to the OPT_PACKAGES list sometime
in the future.