Use project_reader in list servers filters tests

We have project_reader credentials in tempest and they
use the same project as member role creds. Nova support
the project reader role in get server API. Moving the
list servers filters tests to use project reader creds in GET server
API calls.

Change-Id: Ife7b1551c5c948071f38639c442508b1da4b6595
Signed-off-by: Jason Paroly <jparoly@redhat.com>
1 file changed