Cannot use the connection manager north bound API to connect to OVSDB nodes on Mininet

This issue is seen with Helium and Heium-SR1.
Enable the following features:
odl-openflowplugin-all
odl-ovsdb-all
odl-restconf

Check that the odl-adsal-northbound feature is up and running and this feature contains the connection manager using feature:info odl-adsal-northbound

Start a mininet session:
sudo mn --controller=remote,ip=127.0.0.1 --topo linear,2 --switch ovsk,protocols=OpenFlow13

Run the command:sudo ovs-vsctl show to see that the Openflow module is connected to the controller but the ovsdb portion is not.

1c66647f-f231-49b3-aa1a-7e35ffa2da49
Bridge "s1"
Controller "ptcp:6634"
Controller "tcp:127.0.0.1:6633"
is_connected: true
fail_mode: secure
Port "s1-eth1"
Interface "s1-eth1"
Port "s1"
Interface "s1"
type: internal
Port "s1-eth2"
Interface "s1-eth2"
Bridge "s2"
Controller "tcp:127.0.0.1:6633"
is_connected: true
Controller "ptcp:6635"
fail_mode: secure
Port "s2-eth2"
Interface "s2-eth2"
Port "s2-eth1"
Interface "s2-eth1"
Port "s2"
Interface "s2"
type: internal
ovs_version: "1.11.0"

Now if you try to do a PUT to the following URL: http://localhost:8080/controller/nb/v2/connectionmanager/node/HOST1/address/127.0.0.1/port/6634/ it is supposed to connect to the OVSDB schema on the switch. It does not give a response and does not time out and there is nothing in the logs to indicate that the message is being processed.
I am using
https://wiki.opendaylight.org/view/OVSDB_Integration:Mininet_OVSDB_Tutorial
https://wiki.opendaylight.org/view/OVSDB:Helium_and_Openstack_on_Fedora20
https://www.youtube.com/watch?v=xgevyaQ12cg
as references.