Previously each command logs take_action parameters explicitly
by using @utils.log_method decorator or log.debug().
Some commands have no logging.

This commit calls a logger in the base class and
drops all logging definition from individual commands.

Closes-Bug: #1532294
Change-Id: I43cd0290a4353c68c075bade9571c940733da1be

Finish up the SDK integration with server create network and port
find and extension list.

Change-Id: I18dbada784d8aa92a45a937f251023ddf899c53e

Volume is better to be replaced by Block Storage in the
doc.

Change-Id: I736669ee01c7385b6e701cb20f4334eff1c49286

* Sort by command objects
* Drop the comparison to the project CLIs
* Minor updates to command help to match docs

Initially include the cross-API commands to establish the structure and format.

Change-Id: I77a7b3c89e088b66aa62941e29ce0b65b532285b

Network extension list support

Change-Id: I013f68ef2c3329c8db59e2441dd8d4ffafd4470e
Closes-Bug: #1337685

Since cinderclient has support to list extensions, we should add
some of the logic to our list extensions command.

Change-Id: I7dc7ca325ea9b82194bba6d875e7b8dc1884d77e
Closes-Bug: #1337687

Since novaclient has support to list extensions, we should add
some of the logic to our list extensions command.

Closes-Bug: #1337684
Change-Id: I3074225780142df265a34add03e60c0f7c64c711

 - Add support in the common section for extension list. This only
   supports Identity for now. Once the APIs for volume and compute
   are supported in the respective APIs, they will be added. Once
   network is added to this client, it will be added (the API already
   supports it).
 - Include extension fakes for volume and compute for pre-enablement.

Change-Id: Iebb0156a779887d2ab06488a2a27b70b56369376
Closes-Bug: #1319115