Avoid hitting performance issues with api listing

After BZ1025320 default is provide all results
this limits results on each iteration to page_size

Related-To: http://bugzilla.redhat.com/1025320

Change-Id: I2c3cf488df334b5dcf43904a4c67f9abcbe38f87
Signed-off-by: Pablo <Pablo.Iranzo@gmail.com>
Bug-Url: https://bugzilla.redhat.com/1101421
(cherry picked from commit 8c2d3904eef9194d40c2247bd65ce9eee7c26c71)