Establish two connections to the controller from the same switch, The controller should accept both connections.
Code has been pushed into stable carbon to support this. this works in Carbon release but not with latest Carbon code.

This can be reproduced by:

• Start a single node carbon based controller with an OVS switch using mininet
• Establish two conections to the same controller using ovs-vsctl set-controller <bridge> tcp: <controller-IP-Address> : <port> tcp: <controller-IP-Address> : <port>
• sudo ovs-vsctl set-controller s1 tcp:<controller-IP-Address>:6633 tcp:<controller-IP-Address>:6653
• This will succeed on Carbon release but fail on Carbon latest code