feat(cucumber): Support dryrun feature of cucumber

Author: karthiktv006

docs/referenceConf.js

@@ -311,6 +311,7 @@ exports.config = {
     tags: '@dev',
     // How to format features (default: progress)
     format: 'summary'
+    // Other options include `coffee`, `noSnippets`, and `dryRun`
   },
 
   // See docs/plugins.md

lib/frameworks/cucumber.js

@@ -65,6 +65,11 @@ exports.run = function(runner, specs) {
     if (runner.getConfig().cucumberOpts.noSnippets) {
       execOptions.push('--no-snippets');
     }
+
+    // Process Cucumber 'dry-run' param
+    if (runner.getConfig().cucumberOpts.dryRun) {
+      execOptions.push('-d');
+    }
   }
   global.cucumber = Cucumber.Cli(execOptions);