added back sequence fixture

Author: daniel-sanche

tests/system/conftest.py

@@ -258,6 +258,15 @@ def identity(use_mtls, request):
     return construct_client(IdentityClient, use_mtls, transport_name=request.param)
 
 
+@pytest.fixture(params=["grpc", "rest"])
+def sequence(use_mtls, request):
+    return construct_client(
+        SequenceServiceClient,
+        use_mtls,
+        transport_name=request.param
+    )
+
+
 @pytest.fixture(params=["grpc", "rest"])
 def messaging(use_mtls, request):
     return construct_client(MessagingClient, use_mtls, transport_name=request.param)