networking-odl is not py3 (python3.6.7) compatible

[Lajos Katona]

Starting networking-odl with devstack, and enabling python3 in local.conf (USE_PYTHON3=True), results in exception like this:
INFO networking_odl.cmd.set_ovs_hostconfigs [-] Logging enabled!
INFO networking_odl.cmd.set_ovs_hostconfigs [-] SET-HOSTCONFIGS: Executing cmd: ovs-vsctl get Open_vSwitch . _uuid
INFO networking_odl.cmd.set_ovs_hostconfigs [-] SET-HOSTCONFIGS: Executing cmd: ovs-vsctl get Open_vSwitch . datapath_types
ERROR networking_odl.cmd.set_ovs_hostconfigs [-] Fatal error: a bytes-like object is required, not 'str': TypeError: a bytes-like object is required, not 'str'
ERROR networking_odl.cmd.set_ovs_hostconfigs Traceback (most recent call last):
ERROR networking_odl.cmd.set_ovs_hostconfigs File "/opt/stack/networking-odl/networking_odl/cmd/set_ovs_hostconfigs.py", line 488, in main
ERROR networking_odl.cmd.set_ovs_hostconfigs set_ovs_extid_hostconfigs(conf=conf, ovs_vsctl=OvsVsctl())
ERROR networking_odl.cmd.set_ovs_hostconfigs File "/opt/stack/networking-odl/networking_odl/cmd/set_ovs_hostconfigs.py", line 257, in set_ovs_extid_hostconfigs
ERROR networking_odl.cmd.set_ovs_hostconfigs userspace_datapath_types = ovs_vsctl.userspace_datapath_types()
ERROR networking_odl.cmd.set_ovs_hostconfigs File "/opt/stack/networking-odl/networking_odl/cmd/set_ovs_hostconfigs.py", line 419, in userspace_datapath_types
ERROR networking_odl.cmd.set_ovs_hostconfigs for datapath_type in USERSPACE_DATAPATH_TYPES
ERROR networking_odl.cmd.set_ovs_hostconfigs File "/opt/stack/networking-odl/networking_odl/cmd/set_ovs_hostconfigs.py", line 420, in <genexpr>
ERROR networking_odl.cmd.set_ovs_hostconfigs if datapath_types.find(datapath_type) >= 0)
ERROR networking_odl.cmd.set_ovs_hostconfigs TypeError: a bytes-like object is required, not 'str'
ERROR networking_odl.cmd.set_ovs_hostconfigs
+/opt/stack//networking-odl/devstack/entry_points:bind_opendaylight_controller:1 exit_trap
+./stack.sh:exit_trap:522 local r=1

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic

$ python3 --version
Python 3.6.7

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/650876

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/650876
Committed: https://git.openstack.org/cgit/openstack/networking-odl/commit/?id=96c6972b9d4d8150ffd991ec3396feb56903b183
Submitter: Zuul
Branch: master

commit 96c6972b9d4d8150ffd991ec3396feb56903b183
Author: Lajos Katona <email address hidden>
Date: Mon Apr 8 10:52:38 2019 +0200

    set_ovs_hostconfigs on py3 fails with TypeError

    In case of running devstack with USE_PYTHON3=True the command
    neutron-odl-ovs-hostconfig --noovs_dpdk --bridge_mappings=public:
    veth-pub-int fails with TypeError: a bytes-like object is required, not
    'str'.

    Change-Id: I2be64126e336f47676969abe4d81d5a739cb8599
    Closes-Bug: #1822559

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-odl 15.0.0.0b1 development milestone.