Allow run Tungsten tests without tempest_roles=admin

Related-Prod: PROD-24982
Change-Id: Ib225dd3cb143c7bc94c46692162b53eb8961e95e
diff --git a/tungsten_tempest_plugin/tests/api/contrail/rbac_base.py b/tungsten_tempest_plugin/tests/api/contrail/rbac_base.py
index 6b8f6bf..6bbad14 100644
--- a/tungsten_tempest_plugin/tests/api/contrail/rbac_base.py
+++ b/tungsten_tempest_plugin/tests/api/contrail/rbac_base.py
@@ -121,9 +121,6 @@
         super(BaseContrailTest, cls).skip_checks()
         if not CONF.service_available.contrail:
             raise cls.skipException("Contrail support is required")
-        if CONF.auth.tempest_roles != ['admin']:
-            raise cls.skipException(
-                "%s skipped because tempest roles is not admin" % cls.__name__)
         if cls.required_contrail_version:
             cls.skip_if_contrail_version_less(cls.required_contrail_version)