Forcing dynamic credentials for identity admin

Identity tests work with credentials, so it is safer for them
to always use disposable credentials. Forcing dynamic creds
on regular identity tests would be however to restrictive, since it
would prevent any identity test from being executed against clouds
where admin credentials are not available.
Since All admin tests require admin credentials to be
executed, so this will not impact the ability to execute tests.

Change-Id: I0d7716e83d776d83eafe04dd71ac4888c0b71bc4
diff --git a/tempest/api/identity/base.py b/tempest/api/identity/base.py
index 14bf4f8..9515788 100644
--- a/tempest/api/identity/base.py
+++ b/tempest/api/identity/base.py
@@ -105,6 +105,15 @@
 
     credentials = ['primary', 'admin']
 
+    # NOTE(andreaf) Identity tests work with credentials, so it is safer
+    # for them to always use disposable credentials. Forcing dynamic creds
+    # on regular identity tests would be however to restrictive, since it
+    # would prevent any identity test from being executed against clouds where
+    # admin credentials are not available.
+    # Since All admin tests require admin credentials to be
+    # executed, so this will not impact the ability to execute tests.
+    force_tenant_isolation = True
+
     @classmethod
     def setup_clients(cls):
         super(BaseIdentityV2AdminTest, cls).setup_clients()
@@ -165,6 +174,15 @@
 
     credentials = ['primary', 'admin']
 
+    # NOTE(andreaf) Identity tests work with credentials, so it is safer
+    # for them to always use disposable credentials. Forcing dynamic creds
+    # on regular identity tests would be however to restrictive, since it
+    # would prevent any identity test from being executed against clouds where
+    # admin credentials are not available.
+    # Since All admin tests require admin credentials to be
+    # executed, so this will not impact the ability to execute tests.
+    force_tenant_isolation = True
+
     @classmethod
     def setup_clients(cls):
         super(BaseIdentityV3AdminTest, cls).setup_clients()