Enable Node Express benchmarks, fix copy/paste errors

tools/jenkins/run_full_performance.sh

@@ -36,7 +36,7 @@ cd $(dirname $0)/../..
 
 # run 8core client vs 8core server
 tools/run_tests/run_performance_tests.py \
-    -l c++ csharp node ruby java python go \
+    -l c++ csharp node ruby java python go node_express \
     --netperf \
     --category scalable \
     --bq_result_table performance_test.performance_experiment \

tools/run_tests/performance/scenario_config.py

@@ -700,12 +700,12 @@ class NodeExpressLanguage:
     #    client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')
 
     yield _ping_pong_scenario(
-        'node_protobuf_unary_ping_pong', rpc_type='UNARY',
+        'node_express_json_unary_ping_pong', rpc_type='UNARY',
         client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
         categories=[SCALABLE, SMOKETEST])
 
     yield _ping_pong_scenario(
-        'node_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
+        'node_express_json_async_unary_qps_unconstrained', rpc_type='UNARY',
         client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
         unconstrained_client='async',
         categories=[SCALABLE, SMOKETEST])