Build tarballs for upgrade

Usage:
  make fuel-upgrade      - create upgrade for master node (without openstack patches)
  make openstack-upgrade - create upgrade for openstack
  make upgrade           - create full upgrade

blueprint upgrade-to-5-1
Change-Id: I1a0b003d9efd5d85cdae7a41bbbea3eb8415a7b5
Merge "Build tarballs for upgrade"