Add enforce_scope config option for Manila

Add config option to enbale the scoped token.
This option allows running Manila rbac tests.

Change-Id: Ief906f23ac5d898f993fc3c0909ff7d58c25a57a
diff --git a/manila_tempest_tests/config.py b/manila_tempest_tests/config.py
index 6f9813c..92cf7ba 100644
--- a/manila_tempest_tests/config.py
+++ b/manila_tempest_tests/config.py
@@ -21,6 +21,15 @@
                              help="Whether or not manila is expected to be "
                                   "available")
 
+manila_scope_enforcement = cfg.BoolOpt('manila',
+                                       default=False,
+                                       help="Does the Share service API "
+                                            "policies enforce scope? "
+                                            "This configuration value should "
+                                            "be same as manila.conf: "
+                                            "[oslo_policy].enforce_scope "
+                                            "option.")
+
 share_group = cfg.OptGroup(name="share", title="Share Service Options")
 
 ShareGroup = [