Overview: First I try to add new peer-group into bgp. It seemingly succeeds with response 204, or 201 in case of put. It doesnt not apear wihtin the peer-groups openconfig.

Sandbox test error link.

I also have debug karaf.log from bgpcep and bgp protocol, and yangtools when adding the peer-group in attachements. ( in logs there are no errors and warning, and bgp seems to try to merge the configuration correctly. )

Steps to reproduce:
1)start fluorine karaf with
odl-restconf, odl-bgpcep-bgp, odl-bgpcep-bgp-config-example
2)run ./conf_peer_group_simple2.py
(It configures simple peer group with PUT called "custom-group")

at this point peer group should already be within peer-groups.
We can check this with seconds cript.
./get_peer_groups.sh
(which simply does GET with curl at appropriate address)