update README

Change-Id: I13cd8e3ed072a5e3e7baa8e1e3974fdc64f7ee1d
Update puppet-vswitch repository url

Update both other_repos.yaml and .fixtures.yml

Change-Id: Ia2ed38d144b444c518b7396af0fa9d935bb370d7
Merge "update README"
Merge "Update puppet-vswitch repository url"