"""
Implement an Abstract class 'OpenflowConn' and an engine 'SdnConnectorOpenFlow' used for base class for SDN plugings
that implements a pro-active opeflow rules.
"""
Implement an Abstract class 'OpenflowConn' and an engine 'SdnConnectorOpenFlow' used for base class for SDN plugings
that implements a pro-active opeflow rules.