This has been sporadically failing in functional tests due to the way
the volume qos spec list command calls get_associations() for each spec.
When tests run in parallel occasionally a spec from another test is present
in the list returned and is deleted before the get_associations() call is
made, causing a NotFound exception.  We should just keep going when this
occurs.

* make v1 match v2
* add tests to ensure the exception is being caught and handled

Closes-Bug: #1687083
Change-Id: If2d17c1deb53d293fc2c7f0c527a4e4ef6f69976

In volume snapshot command, <volume> is the same
as <snapshot-name> when --volume is not specified,
but <volume> cannot be None, so when <snapshot-name>
is not specified (<snapshot-name> is None), a NoneType
error appears.
So make <snapshot-name> no longer optional, it should
be always present.

Change-Id: I3d9f10753a8ef601e70816421c160598e2cc811f
Closes-bug: #1659894

Cleanup help strings and docs for clarity and to keep things consistent:
* --limit metavar should be <num-resource> to indicate what is being counted
* --marker metavar should be <resource> or <resource-id> to indicate the
  type of value being specified
* <*-ip-address> metavars should be just <ip-address> as there is no difference
  in format between fixed and floating IPs
* Move all occurances of '(name or ID)' to end of help text

Change-Id: I2c31746ed6ded3845244e03e57d809f8bc0e6b9d

* Fix volume transfer request accept to actually not crash when
  trying to call Volume API.
* Fix volume transfer request accept syntax to have only one
  positional argument, which is the ID of the resource in the command
* Change the output column order in volume transfer request list to
  have ID followed by Name then the remaining columns.

Closes-bug: 1633582
Change-Id: I5cc005f039d171cc70859f60e7fe649b09ead229

Add "--no-property" option to "volume set" command in v1 and v2
and update the test cases.

Change-Id: Id5660f23b3b2d9aa72f4c16b19ce83f3f7ed2fa4

Supporting "--no-property" option will apply user a convenient
way to clean all properties of volume snapshot in a short command,
and this kind of behavior is the recommended way to devref.
The patch adds "--no-property" option in "volume snapshot set" command,
and update related test cases and devref document.

Change-Id: I5f10cc2b5814553699920c4343995b2e11416e4e
Implements: blueprint allow-overwrite-set-options