Remove test_get_endpoint_with_each_interface

Remove test_get_endpoint_with_each_interface

It checks all 3 endpoints for image but nothing forces to define them.
Here is the only endpoint created by devstack.

glance      | image          | RegionOne
            |                |   public: http://192.168.1.10/image

[1] keystoneauth1.exceptions.catalog.EndpointNotFound: internal endpoint for image service in RegionOne region not found

Change-Id: If501b849fbbed6df98742db21e924094c1df9c7f
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
(cherry picked from commit 9675c5a0cb2ccd698451a5930708263be5eba527)