Add blueprint for MidoNet quotas ext support

Change-Id: I7c7fa029c12697248809feec3e057e372aa0bcb5
Blueprint: https://blueprints.launchpad.net/neutron/+spec/midonet-support-quotas-ext

specs/juno/midonet-support-quotas-ext.rst

@@ -0,0 +1,95 @@
+==========================================
+Quota extension support for MidoNet plugin
+==========================================
+
+https://blueprints.launchpad.net/neutron/+spec/midonet-support-quotas-ext
+
+Add support for quotas extension in MidoNet plugin.
+
+Problem description
+===================
+
+Current MidoNet plugin does not support quotas extension, which can be
+supported simply by adding "quotas" in supported_extension_aliases
+field in the plugin and "quotas" table in the Neutron database.
+
+Proposed change
+===============
+
+Add quotas in supported_extension_aliases in the plugin as well as
+"quotas" table in the Neutron database.
+
+
+Alternatives
+------------
+None
+
+Data model impact
+-----------------
+
+"quotas" table will be created in the Neutron Database.
+
+
+REST API impact
+---------------
+Users can start using quotas API with MidoNet plugin.
+
+
+Security impact
+---------------
+None
+
+Notifications impact
+--------------------
+None
+
+Other end user impact
+---------------------
+None
+
+Performance Impact
+------------------
+None
+
+Other deployer impact
+---------------------
+None
+
+Developer impact
+----------------
+This introduces a new DB migration script.
+
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+  tomoe
+
+Other contributors:
+
+Work Items
+----------
+
+Add "quotas" in supported_extension_aliases
+Add "quotas" table in the DB
+
+Dependencies
+============
+None
+
+Testing
+=======
+
+Tempest test tempest.api.network.admin.test_quotas covers this feature.
+
+Documentation Impact
+====================
+None
+
+References
+==========
+None