update test data

testing/scenarios/data/test_6_client.json

@@ -18,12 +18,12 @@
     "streamSettings": {
       "network": "tcp",
       "tcpSettings": {
-          "header": {
-            "type": "http",
-            "request": {},
-            "response": {}
-          }
+        "header": {
+          "type": "http",
+          "request": {},
+          "response": {}
         }
+      }
     },
     "settings": {
       "servers": [