Leverage the new cliff command class attribute (_description)
to get the help of a command, this allows us to mark strings
for translation. We could not do this before since the help
was grabbed from the docstring.
This also depends on a new release of cliff and a bump to the
minimum level in osc's requirements.
Closes-Bug: 1636209
Depends-On: Id915f6aa7d95a0ff3dc6e2ceaac5decb3f3bf0da
Change-Id: I8673080bb5625e8e3c499feaefd42dfc7121e96f
Use file logger for all command specific logs.
This patch also fixes some usage that doesn't
follow rules in:
http://docs.openstack.org/developer/oslo.i18n/guidelines.html
After this patch, all self.log and self.app.log
will be standardized to LOG().
NOTE: In shell.py, we got the log in class OpenStackShell,
which is also known as self.app.log in other classes.
This logger is used to record non-command-specific logs.
So we leave it as-is.
Change-Id: I114f73ee6c7e84593d71e724bc1ad00d343c1896
Implements: blueprint log-usage
