create test to verify catalog standardization

this test will verify whether or not the catalog that it is run
against uses approved names for the services it contains. This
patch will include a few additions:
- a minimal client which will "GET" and return the service catalog,
- unit testing for the new client
- and a test that will make sure that the service catalog uses a
  naming scheme that is compatible with the established governance-
  approved naming scheme.

Change-Id: Ia745dff050f35cc5a3fc3744d58c6fe1e875e56f
diff --git a/releasenotes/notes/tempest-identity-catalog-client-f5c8589a9d7c1eb5.yaml b/releasenotes/notes/tempest-identity-catalog-client-f5c8589a9d7c1eb5.yaml
new file mode 100644
index 0000000..dcaaceb
--- /dev/null
+++ b/releasenotes/notes/tempest-identity-catalog-client-f5c8589a9d7c1eb5.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - Add a new identity catalog client. At this point, the new client
+    contains a single functionality, "show_catalog", which returns a
+    catalog object.