Only include executed scenarios and steps in the JSON output

Do not include the Scenario Outline and Examples given as information
before the execution of the instantiated scenarios from the outline.
This unified the JSON output from Cucumber-JVM regardless of the feature
is executed by the command line runner, the JUnit runner of the TestNG
runner. The JUnit runner differs from the other by not sending the
Scenario Outline and Examples as information to the formatters before
executing the instantiated scenarios from the outline, so this commit
only affects the output from the command line runner and the TestNG
runner.

Author: brasmusson

core/src/main/java/cucumber/runtime/formatter/CucumberJSONFormatter.java

@@ -0,0 +1,38 @@
+package cucumber.runtime.formatter;
+
+import gherkin.formatter.JSONFormatter;
+import gherkin.formatter.model.Examples;
+import gherkin.formatter.model.Scenario;
+import gherkin.formatter.model.ScenarioOutline;
+import gherkin.formatter.model.Step;
+
+public class CucumberJSONFormatter extends JSONFormatter {
+    private boolean inScenarioOutline = false;
+
+    public CucumberJSONFormatter(Appendable out) {
+        super(out);
+    }
+
+    @Override
+    public void scenarioOutline(ScenarioOutline scenarioOutline) {
+        inScenarioOutline = true;
+    }
+
+    @Override
+    public void examples(Examples examples) {
+        // NoOp
+    }
+
+    @Override
+    public void startOfScenarioLifeCycle(Scenario scenario) {
+        inScenarioOutline = false;
+        super.startOfScenarioLifeCycle(scenario);
+    }
+
+    @Override
+    public void step(Step step) {
+        if (!inScenarioOutline) {
+            super.step(step);
+        }
+    }
+}

core/src/main/java/cucumber/runtime/formatter/FormatterFactory.java

@@ -4,7 +4,6 @@
 import cucumber.runtime.io.URLOutputStream;
 import cucumber.runtime.io.UTF8OutputStreamWriter;
 import gherkin.formatter.Formatter;
-import gherkin.formatter.JSONFormatter;
 
 import java.io.File;
 import java.io.IOException;
@@ -37,7 +36,7 @@ public class FormatterFactory {
         put("html", HTMLFormatter.class);
         put("pretty", CucumberPrettyFormatter.class);
         put("progress", ProgressFormatter.class);
-        put("json", JSONFormatter.class);
+        put("json", CucumberJSONFormatter.class);
         put("usage", UsageFormatter.class);
         put("rerun", RerunFormatter.class);
     }};

core/src/test/java/cucumber/runtime/RuntimeTest.java

@@ -2,6 +2,7 @@
 
 import cucumber.api.PendingException;
 import cucumber.api.Scenario;
+import cucumber.runtime.formatter.CucumberJSONFormatter;
 import cucumber.runtime.io.ClasspathResourceLoader;
 import cucumber.runtime.io.Resource;
 import cucumber.runtime.io.ResourceLoader;
@@ -51,7 +52,7 @@ public void runs_feature_with_json_formatter() throws Exception {
                 "  Scenario: scenario name\n" +
                 "    When s\n");
         StringBuilder out = new StringBuilder();
-        JSONFormatter jsonFormatter = new JSONFormatter(out);
+        JSONFormatter jsonFormatter = new CucumberJSONFormatter(out);
         List<Backend> backends = asList(mock(Backend.class));
         ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
         RuntimeOptions runtimeOptions = new RuntimeOptions("");

core/src/test/resources/cucumber/runtime/formatter/JSONPrettyFormatterTest.json

@@ -97,69 +97,6 @@
         ],
         "type": "scenario"
       },
-      {
-        "id": "feature-3;scenariooutline-1",
-        "description": "",
-        "name": "ScenarioOutline_1",
-        "keyword": "Scenario Outline",
-        "line": 14,
-        "steps": [
-          {
-            "name": "so_1 \u003ca\u003e",
-            "keyword": "Given ",
-            "line": 15
-          },
-          {
-            "name": "so_2 \u003cc\u003e cucumbers",
-            "keyword": "When ",
-            "line": 16
-          },
-          {
-            "name": "\u003cb\u003e so_3",
-            "keyword": "Then ",
-            "line": 17
-          }
-        ],
-        "examples": [
-          {
-            "id": "feature-3;scenariooutline-1;",
-            "description": "",
-            "name": "",
-            "keyword": "Examples",
-            "line": 19,
-            "rows": [
-              {
-                "id": "feature-3;scenariooutline-1;;1",
-                "cells": [
-                  "a",
-                  "b",
-                  "c"
-                ],
-                "line": 20
-              },
-              {
-                "id": "feature-3;scenariooutline-1;;2",
-                "cells": [
-                  "12",
-                  "5",
-                  "7"
-                ],
-                "line": 21
-              },
-              {
-                "id": "feature-3;scenariooutline-1;;3",
-                "cells": [
-                  "20",
-                  "5",
-                  "15"
-                ],
-                "line": 22
-              }
-            ]
-          }
-        ],
-        "type": "scenario_outline"
-      },
       {
         "description": "",
         "name": "",