The build script downloads ODL's release tarball to
Vagrant's home directory, which is hard linked to
the user's local system as the git-tracked dir
with the RPM building Vagrantfile. Anyone that runs
the RPM-building script will benefit from this rule.
Change-Id: I60fa705938d947d8bf55fae8abba3f9e5f191a9d Signed-off-by: Daniel Farrell <dfarrell@redhat.com>