Set Azure CNI default mode to l2bridge (#3104)
Set Azure CNI default mode to l2bridge (#3104)

* remove testing code

* remove testing code

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