Remove Deprecated parameters for keystone::endpoint class

List of deprecated parameters and their replacements:
- public_protocol (replaced by public_url)
- public_address (replaced by public_url)
- public_port (replaced by public_url)
- internal_address (replaced by internal_url)
- internal_port (replaced by internal_url)
- admin_address (replaced by admin_url)
- admin_port (replaced by admin_url)

Change-Id: I9233c2b398bc4d357310c2eb931ffe69f6bdeede
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>
(cherry picked from commit 4fe6406bbe1eb4f042d666babdf42d9d15bc6871)