releasenotes: add notes for Mitaka cycle

Change-Id: I5a262ed4af0aba0a1e936ac158fed8dfeb1491a1

releasenotes/notes/keystone_v3_neutron-62f3f801039ddcc8.yaml

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+---
+features:
+  - Align nova/neutron configuration for Keystone v3.

releasenotes/notes/mitaka_drepecations-704e9befd68c3c6d.yaml

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+---
+deprecations:
+  - Preparation for default endpoint names rename.
+    In a future release, service_name parameter default value will be
+    changed to "Compute Service".
+  - Deprecate nova::utilities.
+  - Remove EC2 support.
+  - Drop use of deprecated neutron auth options.
+  - Use identity_uri and auth_uri by default.
+  - Remove installation of pm-utils.
+  - Move availability zone parameters to a new class, with deprecation support.
+    Parameters affected are default_availability_zone, default_schedule_zone,
+    and internal_service_availability_zone.

releasenotes/notes/mitaka_features-ddeb388524fa6590.yaml

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+---
+features:
+  - Add WSGI support for Nova API with Apache.
+  - Add support for CPU pinning.
+  - Add support for IPv6 in VNC proxy.
+  - Add support for new Nova API database.
+  - Allow to enable/disable IPv6 support.
+  - Add hooks for external install & svc management.
+  - Extend quota support.
+  - Nova Cells support for nova_aggregate provider.
+  - Add missing parameters in nova.conf for SSL

releasenotes/notes/nova_network_provider-10b28e14d9db08f0.yaml

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+---
+other:
+  - Rewrite nova_network provider with using only nova client.

releasenotes/notes/pymysql-e57bf1f0289dd426.yaml

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+---
+features:
+  - Support of PyMySQL driver for MySQL backend.

releasenotes/notes/remove_qpid-0b446db43fdea617.yaml

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+---
+deprecations:
+  - Remove QPID messaging support.
+    Qpid messaging driver is removed from oslo.messaging so we won't support
+    anymore.