fix StartChangeStream

Author: FGasper

internal/verifier/change_stream_test.go

@@ -40,7 +40,7 @@ func (suite *MultiSourceVersionTestSuite) TestStartAtTimeNoChanges() {
 	suite.Require().NoError(err)
 	origStartTs := sess.OperationTime()
 	suite.Require().NotNil(origStartTs)
-	err = verifier.StartChangeStream(ctx, *origStartTs)
+	err = verifier.StartChangeStream(ctx)
 	suite.Require().NoError(err)
 	suite.Require().Equal(verifier.srcStartAtTs, origStartTs)
 	verifier.changeStreamEnderChan <- struct{}{}
@@ -60,7 +60,7 @@ func (suite *MultiSourceVersionTestSuite) TestStartAtTimeWithChanges() {
 	suite.Require().NoError(err)
 	origStartTs := sess.OperationTime()
 	suite.Require().NotNil(origStartTs)
-	err = verifier.StartChangeStream(ctx, *origStartTs)
+	err = verifier.StartChangeStream(ctx)
 	suite.Require().NoError(err)
 	suite.Require().Equal(verifier.srcStartAtTs, origStartTs)
 	_, err = suite.srcMongoClient.Database("testDb").Collection("testColl").InsertOne(