change outbound networking check to use more portable constructs (#3570)
change outbound networking check to use more portable constructs (#3570)


Azure/acs-engine,Azure/acs-engine,Azure/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine,Azure/acs-engine,jackfrancis/acs-engine,jackfrancis/acs-engine