Add pagination to v2 image-list

* Use a recursive generator function to iterate over the image
  container. The presence of next links are indicators to
  continue pagination while their value drives the location of
  the next page.
* A user can pass in --page-size on the command line, or page_size
  when using the controller directly, to control how many images
  are requested with each subsequent paginated request. Default page
  size is 20.
* Add a flag (strict_url_check) for the FakeAPI class to control
  whether it chops off query params when trying to match a request
  to a fixture.
* Related to bp glance-client-v2.

Change-Id: Ib98e912a7af0bb570b4fd738733edd9b837d1a12

glanceclient/v2/shell.py

@@ -17,9 +17,14 @@ from glanceclient.common import utils
 from glanceclient import exc
 
 
+@utils.arg('--page-size', metavar='<SIZE>', default=None, type=int,
+           help='Number of images to request in each paginated request.')
 def do_image_list(gc, args):
     """List images."""
-    images = gc.images.list()
+    kwargs = {}
+    if args.page_size is not None:
+        kwargs['page_size'] = args.page_size
+    images = gc.images.list(**kwargs)
     columns = ['ID', 'Name']
     utils.print_list(images, columns)