Update v3_endpoint_type to use public

The default endpoint type for OpenStack Identity should be the public
version, and it was something missed for a while.

Change-Id: Ib679fb21d8d815317ecdd03e40dfe16e6ef3915e
diff --git a/releasenotes/notes/update-v3-entrypoint-29d56c902439cc03.yaml b/releasenotes/notes/update-v3-entrypoint-29d56c902439cc03.yaml
new file mode 100644
index 0000000..363e59f
--- /dev/null
+++ b/releasenotes/notes/update-v3-entrypoint-29d56c902439cc03.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Update default value of config option ``CONF.identity.v3_entrypoint_type``
+    from adminURL to public. This was deprecated in Q release, and was missed.
+    The default entrypoint used by tempest should be the public one.