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This feature is useful for logging by external applications like kamaki
New member variables:
  self.log_request=dict(method=.., path=.., headers=.., body=..)
  self.log_response=dict(status=.., message=.., data=..)

Mention `resource-modify --update-existing-base-projects' and
`reconcile-quota'; clarify cyclades and pithos API changes.

Do not pass service token in AstakosClient calls.

Endpoints no more end in slash.

Use POST /tokens to authenticate. Delete AstakosClient.get_user_info()
and replace its uses by AstakosClient.authenticate().

Introduce function authenticate(), which performs POST /tokens in
private mode, i.e. giving a token to be checked for authentication.
Function get_endpoints() performs the call in public mode, in order
to retrieve the endpoints.

Initialize endpoints lazily: when a URL is missing, get_endpoints()
is triggered.

Set up the newly created machine to prefer IPv4 connections
(mainly for apt-get) over IPv6 connections.

Astakos' Authenticate Api Method has deprecated the `usage' request
parameter. Remove it from AstakosClient.

Change AstakosClient to use ASTAKOS_AUTH_URL as entry point to the
Astakos service, instead of ASTAKOS_BASE_URL it was using until now.

Remove ASTAKOS_BASE_URL from Cyclades settings, replace it with
ASTAKOS_AUTH_URL. Modify Cyclades to determine ASTAKOS_ACCOUNT_URL and
ASTAKOS_UI_URL with calls to astakosclient.

Move astakos_services from astakosclient to astakos.api.services.

Accept auth_url as the default entry point and
query astakos endpoints to find out the
account and ui urls.

Remove check for not allowed request method in view_method() decorator.
Let the api_method() decorator handle such cases.

Refs: #4501

Refs: #4502

Mock the 'snf_django.lib.astakos.get_user' function.
The way it was done didn't seem to work.

Add tests

Argument passed to PublicKeyPair.user_limit_exceeded() was a dict
rather that a string (user uuid). Django would happily convert it
to a string and pass it through to the database query.

Also fix a minor bug in tests.

Use the newer config.get("global", ..) syntax.
Fallback to the old one for older version of kamaki.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>

Rewrite the script in python.
Invoke pep8 for a list of files given in the command line.
Exclude files which are not python ones (their names don't
end with .py) or are not real files (i.e. have been removed
during the last commit).