Rearrange neutronclient exceptions for more easy use

- Map exceptions from neutron server into corresponding client
  exceptions automatically (without exception mapping dict).
  An exception from Neutron server 'SomeException' will be
  mapped to an exception 'SomeExceptionClient' ('Client' suffix)
  if it is defined.

- If no corresponding exception is defined in client side,
  an exception per response code will be used. Previously
  NeutronClientException was used for all cases and a user
  of client library cannot know exception type without
  checking exception.status_code. It allows client lib users
  (such as Horizon) to handle exceptions more easily.

- All exceptions from client libarry inherit NeutronClientException
  and all CLI related exceptions inherits NeutronCLIError now.

- Remove unused exceptions (including Quantum v1 related)
- MalformedRequestBody is renamed to MalformedResponseBody
  because it is raised in deserializer and deserializer is
  used to parse not request but response.

Closes-Bug: #1296148
Change-Id: I99b9560b3afaf5884fd00353323267da450338fa
Merge "Rearrange neutronclient exceptions for more easy use"