change network tag to prep vs provision

Change-Id: I40819abd2c5176ac52048ddfdd22a55da363e64b
Update README.md
Update rdopkg playbook

Change-Id: I3962f201166d59c2e9df6b14da7fb4a94a6c019f
HACK to use tags set by rdopkg

Change-Id: I9768730f0e3edc257691e6e9baaa665c20a7e124
Add pause before running tempest

Change-Id: If7e7269db94407b2e9bc46c6efe1ad73865c52ee
workaround for rdopkg

Change-Id: Ic390db9d56b4eae0744819218f62063f07a26c5e
no yum update for f21 image

Change-Id: Ief95a980db00dedaae5e3f03ab51afa6b2a0f245