Add release notes for federation protocol commands

Release notes to go with change
I4f1303b7b6c7ea2e67e5770745db060f08ba7761 that migrates the federation
protocol commands to SDK.

Change-Id: Ia2dbdefd505a44527c97c7549f33edcbdd7831c0
Signed-off-by: 0weng <oweng@osuosl.org>

Author: ArtofBugs

releasenotes/notes/migrate-federation-protocol-to-sdk-43dc2b50fb277da6.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Migrate ``federation protocol`` commands from keystoneclient to SDK.
+upgrade:
+  - |
+    Filtering in ``federation protocol`` commands is now case sensitive.