Backup commands are used only in volume service now,
but "backup" is too generic, users may not know the
commands are used for volume from the commands name.
By seeing the command name, users can only see the
"backup" but do not know which object the backup
commands work for. It may confuse users. I think
rename "backup" to "volume backup" can depict resource
relation and will be helpful for users to know the
commands clearly.

So add new commands ``volume backup create/delete/
list/show/restore`` to replace the old commands
``backup create/delete/list/show/restore``. And also
deprecate old commands.

Change-Id: I4f844d9bc48573eb4d17288ce6b8a90cea00d16a
Implements: bp backup-snapshot-renamed-for-volume-resource
Co-Authored-By: Sheel Rana <ranasheel2000@gmail.com>

some "dest" argument is useless because they are
the same as the option name. So remove them.

Change-Id: Idd37e8816cf8b0833c94a5e741fdfe56602551f9

Add ``--force`` option to ``volume qos delete`` command in volume
v1 and v2 to allow users to delete in-use QoS specification(s).

Change-Id: I46036e5f55ced8b8a1be54c521f2a5c242b89160
Closes-Bug: #1596821

Tested "find_resulce()" can find a backup by name or ID.
But some help messages and doc were "ID only", this patch
modify them.

Change-Id: I22dcc3a0b40f2bafabb6d26498158e2468037312

Added the ability to delete multiple volume types at once. Note
there are no unit tests exist for v1 volume-types, so instead
a functional test was created.

Partial-Bug: #1592906
Change-Id: I99f3f22901ab35252b91a3072b14de7d19cb17ca

self.app.log is the logger in class OpenStackShell,
which should be used to record logs that have nothing
to do with any specific command.

So, use the file logger instead.

This patch also fixes some usage that doesn't follow
rules in:
http://docs.openstack.org/developer/oslo.i18n/guidelines.html
1. add variables to logger as an argument
2. do not wrap variables with str()

Change-Id: I248861a38a4de0412a080046aa7a6f6473c3e082
Implements: blueprint log-usage

The OpenStack LLC copyrights date from before OpenStack was transferred
to the foundation.  These appear to be getting copy-pasted to new files
so at least should reflect the correct entity.

Change-Id: I02953d752cb24ead6aa4ad8bfe257a48317c9f13

Leave command.py and test_command.py as a sanity check during the
deprecation period.

Change-Id: I24e1b755cbfbcbcaeb5273ec0c9706b82384fc85