Today we have a number of extensions that must provide
boilerplate/redundant code in their extension class to return
basic API definition attributes such as name, description, alias,
etc.. For example [1].
This patch proposes we can provide most of that boilerplate code
right in a base extension descriptor class; just have extension
sub-classes provide their API definition. With this patch, code such
as [1] gets reduced to a class definition with a single class-level attribute
to specify the API definition for the extension.
For sample usage, have a look at [2] that used as a dummy patch
to test PS4/PS7 of this change with neutron master.
[1] https://review.openstack.org/#/c/421562/2/neutron/extensions/providernet.py@36
[2] https://review.openstack.org/#/c/433929/1/neutron/extensions/providernet.py
Change-Id: I25135b39a1d26c11006bc2a7b6080cdd839f0085
dd4ffe3721