* Updates the Ubuntu baseline build section to forcibly disable the
default daily system package update for security patches
* Make sure that the provision/basebuild directory that the build
template is using exists with a .dummy placeholder
Change-Id: Iffd493c3cfb6263d32d65d06e0e20a3bdbc58926 Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>