Bug 1874741

+++ This bug was initially created as a clone of Bug #1591067 +++

Description of problem:
There are orphan tap devices entries still present in ovs-vsctl show output

Version-Release number of selected component (if applicable):
RHOSP13z11

Actual results:
tap devices still exists on compute nodes after upgrade to OSP13 z11

Expected results:
Tap devices should be clean after deleting the VM. 

Additional Info:

We can see tap devices still present in error state on compute node 
ansible -i inventory  cmp-prod  -m shell -a 'ovs-vsctl show | grep error')  : 

node-x.x.x.x | SUCCESS | rc=0 >>
                error: "could not open network device tap9538318e-dd (No such device)"
                error: "could not open network device tap6840d303-27 (No such device)"
                error: "could not open network device tapb53097fe-50 (No such device)"
                error: "could not open network device tapb6371131-06 (No such device)"
                error: "could not open network device tap2bbfd7bd-2a (No such device)"
                error: "could not open network device tap5fd23df6-57 (No such device)"

node-x.x.x.x | SUCCESS | rc=0 >>
                error: "could not open network device tap1d638559-89 (No such device)"
                error: "could not open network device tapa845e7e0-14 (No such device)"
                error: "could not open network device tap0b82eac0-6f (No such device)"
                error: "could not open network device tap3fa2706e-5f (No such device)"
                error: "could not open network device tap56f08b45-16 (No such device)"
                error: "could not open network device tapc1d9359f-72 (No such device)"
                error: "could not open network device tap848a098c-f6 (No such device)"
                error: "could not open network device tap09d5407b-47 (No such device)"
                error: "could not open network device tap387e7859-20 (No such device)"
                error: "could not open network device tap63f9a7f6-48 (No such device)"
                error: "could not open network device tap22ce12dc-c4 (No such device)"
                error: "could not open network device tap2781969c-fb (No such device)"
                error: "could not open network device tap074a969f-fa (No such device)"

...
...
...



RPMs details are from compute node:
 
openstack-neutron-12.1.1-6.el7ost.noarch                    Sun Jul 12 02:33:22 2020
openstack-neutron-common-12.1.1-6.el7ost.noarch             Sun Jul 12 02:32:28 2020
openstack-neutron-l2gw-agent-12.0.2-0.20190420004620.270972f.el7ost.noarch Sun Jul 12 02:34:15 2020
openstack-neutron-lbaas-12.0.1-0.20190803015156.b86fcef.el7ost.noarch Sun Jul 12 02:33:46 2020
openstack-neutron-lbaas-ui-4.0.1-0.20190723082436.ccf8621.el7ost.noarch Sun Jul 12 02:33:46 2020
openstack-neutron-linuxbridge-12.1.1-6.el7ost.noarch        Sun Jul 12 02:34:14 2020
openstack-neutron-metering-agent-12.1.1-6.el7ost.noarch     Sun Jul 12 02:34:15 2020
openstack-neutron-ml2-12.1.1-6.el7ost.noarch                Sun Jul 12 02:32:30 2020
openstack-neutron-openvswitch-12.1.1-6.el7ost.noarch        Sun Jul 12 02:34:14 2020
openstack-neutron-sriov-nic-agent-12.1.1-6.el7ost.noarch    Sun Jul 12 02:34:15 2020
puppet-neutron-12.4.1-10.el7ost.noarch                      Sun Jul 12 02:33:18 2020
python2-neutronclient-6.7.0-1.el7ost.noarch                 Mon May 20 05:38:59 2019
python2-neutron-lib-1.13.0-2.el7ost.noarch                  Sun Jul 12 02:32:17 2020
python-neutron-12.1.1-6.el7ost.noarch                       Sun Jul 12 02:32:20 2020
python-neutron-lbaas-12.0.1-0.20190803015156.b86fcef.el7ost.noarch Sun Jul 12 02:32:20 2020


The setup is upgrade from RHOSP13z5 to RHOSP13z11

To clean this tap devices manual intervention is carried out
~~~
for i in $(ovs-vsctl --columns name,error list interface | grep "could not" -B2 | grep name| awk '{print $3}' | sed 's/"//g'); do ovs-vsctl del-port $i; done
~~~