update to latest version of CNI plugin (#3345)
update to latest version of CNI plugin (#3345)

https://github.com/containernetworking/plugins/releases/tag/v0.7.1
jackfrancis/acs-engine,Azure/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,Azure/acs-engine