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Fixes grnet/kamaki#58

This bug fix refers to the LoggedAstakosClient wrapper.
The class AstakosClient is not forced to use a default logger.

Fixes grnet/kamaki#56

The bug is limited in "kamaki create network"

Kamaki would try to verify the SSL connection even when '-k' flag was
given and then would fall back. This doesn't work because we cannot use
the same socket twice.

Closes grnet/kamaki#32

Kamaki CLI commands use some generic output methods to handle outputs.

Generic output methods that escape control characters:
- in kamaki.cli.utils: print_items, print_dict, print_list
- in kamaki.cli.cmds: error

Generic output methods that don't escape control characters:
- in kamaki.cli.cmds: writeln, write

The methods that don't escape control characters are used when the
standard methods are not sufficient. For example, in "kamaki.cli.pithos"
the "PithosAccount.print_objects" method adds decorative escape characters
(i.e., bold, alignment), but has to escape the parts object and container
names. To achieve this, escaping is handled in the method, and the output
is printed with the "write" and "writeln" methods mentioned earlier.

An encoding issue with kamaki.cli.errors.CLIError and the Exceptions extending it,
is fixed. It is now ensured that the error message will always be in unicode.

Also, fix flake8 errors on files affected by the above changes

Refs grnet/kamaki#32

String decoding was used to deal with unicode strings, which were
encoded as "unicode_escape" in earlier steps. The later was wrong and
it was fixed with 18d5b053
The present commit completes the fix by undoing the decoding.

Refs grnet/kamaki#32

Implement method escape_ctrl_chars
Escape control characters in HTTP data logs
Remove misleading separators from HTTP logs

Refs grnet/kamaki#54

Refs grnet/kamaki#59

Add an SSL Authentication section under "Developers Guide".
Update existing examples and descriptions with SSL related information.

Refs #55

If no CA certificates are set, kamaki clients will use
CACERTS_DEFAULT_PATH from "kamaki.defaults".

This commit concerns applications using "kamaki.clients", but does
not affect the kamaki CLI.

Refs #54

Both options are set either in the config file or as runtime
arguments.

ignore-ssl option allows connections without checking SSL certificates.

The ca-certs option provides a CA file for SSL authentication.

Normally, if no cert files are provided or they are invalid, kamaki
attempts to connect anyway, and an SSL Error ensues.

If ignore-ssl is set to "on", kamaki connects to servers regardless of
the existence or validity of a cert file and all SSL errors are ignored.

To help package maintainers to provide the correct CA file for their platform,
the default path is set in "kamaki/defaults.py" as CACERTS_DEFAULT_PATH

Refs #54

The module objpool.http provides pooled connections without SSL
Authentication.
A new connection class is implemented in kamaki.clients.utils.https
The name of the class is HTTPSClientAuthConnection
The PooledHTTPConnection is patched to provide HTTPSClientAuthConnection
instances as https connections.

Also, astakosclient module is patched to use the same https connection class.

This reverts commit 556d5f15.
For more information, please see the discussion on Issue #32.

Download progress bar was using the number of missing blocks as
its length.
It now uses the total number of blocks in the file, instead.

Fixes #41

This bug was located at the code that parses the command terms.
If a term is invalid with respect to the current locale settings,
an "Unknown error" was being raised.
Kamaki is now reporting a descriptive error with a reference to
the faulty term.

Fixes #36

The terms "no-vnc" and "no-vnc-encrypted" are expected to be easily
understood by users, while the equivalent terms vnc-ws and vnc-wss
(respectively) are used in Compute API. Kamaki CLI will now
accept both terms by internally translating the former to the later.

Refs #36

New types: vnc-ws, vnc-wss

Refs #36

New types: vnc-ws, vnc-wss

Fixes #32

This commit ensures that control characters are escaped in all
HTTP response bodies, as long as they are parsed as json strings
Raw content is kept intact
Response header contents were already handled correctly

Fixes #37

When creating a server, custom metadata "os" and "users" are
automatically derived from the image properties. This commit
allows users to overwrite them or add extra custom metadata
at server creation time.

Replace 'VMC' with 'VNC' for 'server console' command.

Close grnet/kamaki#40

Delete trailing whitespace and fix ':' alignment.

Ref grnet/kamaki#40

Named arg project_id was mistyped.

Description of the problem: The "print_" method is used internally
to print API results. The old name of the method was "_print" and
blockstorage commands had leftovers of that.

Uploads and downloads have the form
kamaki file ACTION SOURCE [TARGET]

Problem:
If the SOURCE is a path and TARGET is missing, kamaki used to preserve
the path structure on the destination e.g.,
$ kamaki file upload /tmp/some/file.txt
  create remote dir tmp
  create remote dir tmp/some
  upload /tmp/some/file.txt --> tmp/some/file.txt

Solution:
Use the basename of the SOURCE in this case e.g.,
$ kamaki file upload /tmp/some/file.txt
  upload /tmp/some/file.txt --> file.txt

Fixes #31

Fixes #30

Also, adjust to new "kamaki.cli" naming conventions

The Cyclades client overrides some methods of the OS-specific
client, due to API differences: create_volume, create_snapshot

Unit tests for these methods are also implemented

Includes unit tests