fix: add operation name to x-goog-request-params (#133)

diff --git a/tests/unit/operations_v1/test_operations_client.py b/tests/unit/operations_v1/test_operations_client.py
index bd7f373..ed19b7f 100644
--- a/tests/unit/operations_v1/test_operations_client.py
+++ b/tests/unit/operations_v1/test_operations_client.py
@@ -24,9 +24,10 @@
     client = operations_v1.OperationsClient(channel)
     channel.GetOperation.response = operations_pb2.Operation(name="meep")
 
-    response = client.get_operation("name", metadata=[("x-goog-request-params", "foo")])
+    response = client.get_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.GetOperation.calls[0].metadata
+    assert ("header", "foo") in channel.GetOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.GetOperation.calls[0].metadata
     assert len(channel.GetOperation.requests) == 1
     assert channel.GetOperation.requests[0].name == "name"
     assert response == channel.GetOperation.response
@@ -42,12 +43,13 @@
     list_response = operations_pb2.ListOperationsResponse(operations=operations)
     channel.ListOperations.response = list_response
 
-    response = client.list_operations("name", "filter", metadata=[("x-goog-request-params", "foo")])
+    response = client.list_operations("name", "filter", metadata=[("header", "foo")])
 
     assert isinstance(response, page_iterator.Iterator)
     assert list(response) == operations
 
-    assert ("x-goog-request-params", "foo") in channel.ListOperations.calls[0].metadata
+    assert ("header", "foo") in channel.ListOperations.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.ListOperations.calls[0].metadata
     assert len(channel.ListOperations.requests) == 1
     request = channel.ListOperations.requests[0]
     assert isinstance(request, operations_pb2.ListOperationsRequest)
@@ -60,9 +62,10 @@
     client = operations_v1.OperationsClient(channel)
     channel.DeleteOperation.response = empty_pb2.Empty()
 
-    client.delete_operation("name", metadata=[("x-goog-request-params", "foo")])
+    client.delete_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.DeleteOperation.calls[0].metadata
+    assert ("header", "foo") in channel.DeleteOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.DeleteOperation.calls[0].metadata
     assert len(channel.DeleteOperation.requests) == 1
     assert channel.DeleteOperation.requests[0].name == "name"
 
@@ -72,8 +75,9 @@
     client = operations_v1.OperationsClient(channel)
     channel.CancelOperation.response = empty_pb2.Empty()
 
-    client.cancel_operation("name", metadata=[("x-goog-request-params", "foo")])
+    client.cancel_operation("name", metadata=[("header", "foo")])
 
-    assert ("x-goog-request-params", "foo") in channel.CancelOperation.calls[0].metadata
+    assert ("header", "foo") in channel.CancelOperation.calls[0].metadata
+    assert ("x-goog-request-params", "name=name") in channel.CancelOperation.calls[0].metadata
     assert len(channel.CancelOperation.requests) == 1
     assert channel.CancelOperation.requests[0].name == "name"