Set the iso8601 log level to WARN

When use "--debug" parameter in other projects's CLI, it may display
useless iso8601 debug info, this is because  other client's CLI will
call keystoneclient to get token, and keystoneclient will display the
iso8601 debug info.

set the iso8601 log level to "WARN" to avoid this issue.

Change-Id: Id90c86f0e7c8e9ae47ca53667f469d111d6ae373
Closes-bug: #1324470
Link to docstrings in using-api-v3

The references to classes and modules were just the names and
didn't link to the docstrings for the class or module. With this
change, names are now links to the class or module.

Change-Id: I9c7c03e8221ca71c7fddc0682abadc7a78d371db
Merge "Set the iso8601 log level to WARN"