GitLab

Refs: #4058

Refs: #4114

E.g. the cyclades spec package contains the non-optional group "server" and
the optional group "floatingip". Now kamaki can load only the "server"
group, except if the user requests the loading of "floatingip" group too.

Refs: 3632

    Modify print_list/dict/items methods of kamaki.cli.utils to be simpler
    and print output in a simpler form

    key: value
    key:
        key: value
        key:
            key: value
            ...
        key:
            list-item

            list-item
        key-for-list-of-dicts:
            key: value
            key: value

            key: value
            ...

Refs: #3934

Refs: #3934

config set remote.smth.option value
  inserts option=value in remote smth
config get remote.smth
  lists the contents (key=val) of remote smth
config delete remote.smth.option
  deletes this specific option from the remote smth
config delete remote.smth
  completely erased the remote smth

Refs: #3934

Refs: #3874

In current configuration, kamaki checks for auth_url. If that fails,
it raises an error. If it is not set, it prints a warning and attempts
to read the <service>.url option from the configuration file.

Service urls: astakos.url, pithos.url, cyclades.url, plankton.url

Refs: #3874

Use kamaki.clients.astakos.AstakosClient as a cached astakos client to get
user information and, most importantly, endpoints. Allow users to authenticate
multiple tokens on the same session. In every session there must be at most
one authentication per user/token.

Major change: top kamaki.cli.commands class now contains a base_auth field
with the cached authenticating client. All urls are drained from this field.

Refs: #3736

Refs: #3716

Behavior After This:
kamaki -XXX -YY ... parses -XXX -YY
If not recognized: syntax error
If recognized, group them into shell args (e.g. -h) and command args (e.g. -d)
Whenever a command is run in this shell instance, apply the command args

Practically, users may pass the -d or -v args to the shell and enjoy streaming
debug or verbosity logs, without having to pass -d or -v args on each command

This caused warnings about preset variables

- image compute group contains all Compute Image API commands, as oposed to
Plankton API commands.

- definition of a kamaki cli command slightly changed: a command with
subcommands can have a class without being a command itself, as long as it has
subcommands! Thus a subcommand group can be defined with docs and everything.

- image public is not image list (docs not updated yet)

argparse people must be sadists or they just hate other programers

kamaki -v runs a kamaki shell with verbose on!

and add a space after :

load 1 3 5-7 8 ...
also can repeat commands:
load 1 4 1 3-5 (repeats 1 and 4)

Two modes: astakos service and astakos admin
They both have a userinfo command

config module is needed for initializing stuff, but should not be
allowd *after* shell is up and running