Another weird one. There are two oddities here. Firstly, creation of a
trait is a PUT request and doesn't return a body, only a 'Location'. It
also doesn't error out if the trait already exists but rather returns a
HTTP 204. This is mostly handled by setting the 'create_method'
attribute. Secondly, the list response returns a list of strings rather
than a list of objects. This is less easily worked around and once again
requires a custom implementation of the 'list' class method.
We extend the 'QueryParameter' class to accept a new kwarg argument,
'include_pagination_defaults', which allows us to disable adding the
default 'limit' and 'marker' query string parameters: Placement doesn't
use these.
Change-Id: Idafa6c5c356d215224711b73c56a87ed7a690b94
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>