Define a default test for Lwan.

frameworks/C/lwan/benchmark_config

@@ -1,13 +1,30 @@
 {
   "framework": "lwan",
   "tests": [{
+    "default": {
+      "setup_file": "setup",
+      "plaintext_url": "/plaintext",
+      "json_url": "/json",
+      "port": 8080,
+      "approach": "Realistic",
+      "classification": "Platform",
+      "database": "None",
+      "framework": "lwan",
+      "language": "C",
+      "orm": "Raw",
+      "platform": "Lwan",
+      "webserver": "Lwan",
+      "os": "Linux",
+      "database_os": "Linux",
+      "display_name": "Lwan",
+      "notes": "",
+      "versus": ""
+    },
     "sqlite": {
       "setup_file": "setup",
       "db_url": "/db",
       "query_url": "/queries?queries=",
       "fortune_url": "/fortunes",
-      "plaintext_url": "/plaintext",
-      "json_url": "/json",
       "port": 8080,
       "approach": "Realistic",
       "classification": "Platform",
@@ -28,8 +45,6 @@
       "db_url": "/db",
       "query_url": "/queries?queries=",
       "fortune_url": "/fortunes",
-      "plaintext_url": "/plaintext",
-      "json_url": "/json",
       "port": 8080,
       "approach": "Realistic",
       "classification": "Platform",