Try to remove /identity_admin

We should be able to operate without the identity admin endpoint,
given that in v3 it's all the same. This floats that out there to see
if we can or not.

Change-Id: Ic233f6b43dd1e3cfdadff0f18aba4ea78825a996
diff --git a/lib/tempest b/lib/tempest
index f19686a..c5853c9 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -278,6 +278,10 @@
         iniset $TEMPEST_CONFIG identity-feature-enabled api_v2 False
     fi
     iniset $TEMPEST_CONFIG identity auth_version ${TEMPEST_AUTH_VERSION:-v3}
+    if [[ "$TEMPEST_AUTH_VERSION" != "v2.0" ]]; then
+        # we're going to disable v2 admin unless we're using v2.0 by default.
+        iniset $TEMPEST_CONFIG identity-feature-enabled api_v2_admin False
+    fi
 
     if is_service_enabled tls-proxy; then
         iniset $TEMPEST_CONFIG identity ca_certificates_file $SSL_BUNDLE_FILE