Description of problem:

[raistlin@vkvm1 ~/virt-OSPD]$ sudo vbmc add overcloud-ceph-0 --port 6230
Exception TypeError: "'NoneType' object is not callable" in <function _removeHandlerRef at 0x1fe8de8> ignored

[raistlin@vkvm1 ~/virt-OSPD]$ sudo vbmc list
+------------------+--------+---------+------+
|   Domain name    | Status | Address | Port |
+------------------+--------+---------+------+
| overcloud-ceph-0 |  down  |    ::   | 6230 |
+------------------+--------+---------+------+
Exception TypeError: "'NoneType' object is not callable" in <function _removeHandlerRef at 0x1425de8> ignored


This is a fully patched RHEL7.4 KVM host upon which the following rpms were installed (taken from OSP-12):

python-virtualbmc-1.2.0-1.el7ost.noarch.rpm
python-pyghmi-1.0.22-1.el7ost.noarch.rpm
python2-pbr-3.1.1-2.el7ost.noarch.rpm