Cache zanata cli tools during build, and up the prep-zanata role to
look for the cached version in preference to dowloading.
Change-Id: If70f3386d0350c94dd1548e7f3c60a1d02914824
This repo was created from filter branching the openstack-infra/
config repo. This process brought a lot of cruft with it in the
form of directories that we no longer need. This patch removes
that cruft so we begin with a tidier repo.
Change-Id: Ibffad1b11c0c5f84eedfb0365369f60c4961a0f3