Migrate the following jobs to zuul v3: * kuryr-libnetwork-fullstack-py3 * kuryr-libnetwork-kuryr_lib-src-fullstack * kuryr-libnetwork-install * kuryr-libnetwork-fullstack-ipv6-only Remove the following unused jobs: * kuryr-libnetwork-install-multinode Change-Id: I54d784fe0bded5f461ba9f26ed901ec042a6bd0d