add vagrant_package.sh for building local cache
add vagrant_package.sh for building local cache

this builds a local devstack base box 'after' you've done one
manager provision. This is a reasonable starting point for future
cloning, and speeds up the provisioning a ton.

Change-Id: I5c9a7975e600ef3a29351b8897110537d22f1b5f

meniy/Devstack-Vagrant,openstack-dev/devstack-vagrant,openstack-dev/devstack-vagrant,verdurin/devstack-vagrant,nexusz99/devstack-vagrant,AlessandroCopler/TestVagrant,j4/devstack-vagrant,AlessandroCopler/TestVagrant,olivierlemasle/devstack-vagrant,unibg-seclab/devstack-vagrant,Sunnepah/devstack-vagrant,meniy/Devstack-Vagrant,Sunnepah/devstack-vagrant,meniy/Vagrant,AlessandroCopler/test_esc,unibg-seclab/devstack-vagrant,j4/devstack-vagrant,meniy/Vagrant,nexusz99/devstack-vagrant,unibg-seclab/devstack-vagrant,AlessandroCopler/test_esc,verdurin/devstack-vagrant,olivierlemasle/devstack-vagrant,meniy/Vagrant