add release notes for mitaka-2

Change-Id: Ie92f29cf190847a19e988660623d0480e979148a

releasenotes/notes/fix-rbac-50825144e0897d7d.yaml

@@ -0,0 +1,14 @@
+---
+upgrade:
+  - >
+    A new default policy.json is provided to properly handle RBAC control.
+    Existing policy.json files may not grant the appropriate access.
+security:
+  - >
+    Patch was added to address inconsistent RBAC policy handling.
+    Certain rules may not have been given appropriate access.
+fixes:
+  - >
+    [`bug 1504495 <https://bugs.launchpad.net/ceilometer/+bug/1504495>`_]
+    Patch was added to address inconsistent RBAC policy handling.
+    Certain rules may not have been given appropriate access.

releasenotes/notes/gnocchi-client-a62ca5a0c717807e.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - >
+    Gnocchi dispatcher now uses client rather than direct http requests
+upgrade:
+  - >
+    gnocchiclient library is now a requirement if using ceilometer+gnocchi.

releasenotes/notes/keystone-v3-support-ffc0f804dbe9d7e9.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - >
+    Add support for Keystone v3 authentication