Description of problem:
When an LB IPv6 is created using a bulk command or when multiple listener-pool-member are added sequentially, the second listener-pool managed fails when adding a member, resulting in the pool's state being in an ERROR state.

The error in traceback is:

2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver Traceback (most recent call last):
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1883, in member_create
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver self._add_member(member, ovn_lb, pool_key)
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1841, in _add_member
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver self._refresh_lb_vips(ovn_lb.uuid, external_ids)
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1051, in _refresh_lb_vips
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver vip_ips = self._frame_vip_ips(lb_external_ids)
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1039, in _frame_vip_ips
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver if netaddr.IPNetwork(lb_vip).version == 6:
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver File "/usr/lib/python3.6/site-packages/netaddr/ip/_init.py", line 938, in __init_
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver raise AddrFormatError('invalid IPNetwork %s' % addr)
2024-02-07 12:40:56.166 13 ERROR networking_ovn.octavia.ovn_driver netaddr.core.AddrFormatError: invalid IPNetwork [fd2e:6f44:5dd8:c956::1a]

So apparently, the LB_VIP is enclosed in additional brackets [ ] when adding the member to the second listener-pool-member.

Version-Release number of selected component (if applicable):
RHOSP 16.2

How reproducible:

Steps to Reproduce:
1. Create a LB over a IPv6 with more than a listener-pool-member
2.
3.

Actual results:
Second pool keeps in ERROR state

Expected results:
LB created correctly