Create missing documentation for Octavia Flavor types and profiles

[cloudnull]

Create documentation on the flavorprofiles and flavors used within octavia.

+--------------------------------------+----------------+---------------+
| id                                   | name           | provider_name |
+--------------------------------------+----------------+---------------+
| 5f4d2c7c-e294-4a9c-b97a-54a2b97a17a5 | fp.single.lite | amphora       |
| 66244e86-c714-4e80-a250-997d414db9d9 | fp.ha.plus     | amphora       |
| a252f357-bd8e-4551-a40c-f98ac857d2f8 | fp.single.pro  | amphora       |
| bea6924c-59d6-42a2-9336-df726ab0bfdf | fp.single.plus | amphora       |
| cfa628f1-2916-419c-876e-7b2d56643323 | fp.ha.lite     | amphora       |
| dc6186a0-82fc-4694-b521-50065ae26516 | fp.ha.pro      | amphora       |
+--------------------------------------+----------------+---------------+

+--------------------------------------+-------------+--------------------------------------+---------+
| id                                   | name        | flavor_profile_id                    | enabled |
+--------------------------------------+-------------+--------------------------------------+---------+
| 3480b6d0-b803-4373-b701-53420d895059 | single.lite | 5f4d2c7c-e294-4a9c-b97a-54a2b97a17a5 | True    |
| 351d67c3-796f-4f41-bbb9-6d8d6bc389a8 | ha.plus     | 66244e86-c714-4e80-a250-997d414db9d9 | True    |
| 63a2533d-ec47-4dc8-b04c-e4c9fd55b6e9 | single.plus | bea6924c-59d6-42a2-9336-df726ab0bfdf | True    |
| 81c4307b-e66c-4c0c-a177-c971951020d3 | ha.pro      | dc6186a0-82fc-4694-b521-50065ae26516 | True    |
| eb107a33-71ae-45a3-941a-05bbe84d33df | single.pro  | a252f357-bd8e-4551-a40c-f98ac857d2f8 | True    |
| f37c3e03-bb8f-4b3a-956c-e45a9c611319 | ha.lite     | cfa628f1-2916-419c-876e-7b2d56643323 | True    |
+--------------------------------------+-------------+--------------------------------------+---------+

While all of these items are available within OpenStack flex, and work, we need to document how to reproduce them and how an operator could extend them.

[sowm9802]

PR merged : #630