JENKINS-2795 Add recurse parameter to listView

Adds the recurse parameter, which is necessary when using the folders
plugin to get things to actually show up.

Author: vjanelle

docs/View-Reference.md

@@ -42,6 +42,7 @@ listView(String name) { // since 1.30
         claim()            // since 1.29, requires the Claim Plugin
         lastBuildNode()    // since 1.31, requires the Build Node Column Plugin
     }
+    recurse() // Recurse down folders, requires Cloudbees Folder Plugin
 }
 view(type: ListView, Closure viewClosure) // since 1.21, deprecated since 1.30
 ```

job-dsl-core/src/main/groovy/javaposse/jobdsl/dsl/views/ListView.groovy

@@ -68,6 +68,16 @@ class ListView extends View {
         }
     }
 
+    /**
+    * Should we look through folders
+    */
+    void recurse(boolean shouldRecurse = true) {
+
+        execute {
+          it / 'recurse' << shouldRecurse
+        }
+    }
+
     static enum StatusFilter {
         ALL, ENABLED, DISABLED
     }

job-dsl-core/src/test/groovy/javaposse/jobdsl/dsl/views/ListViewSpec.groovy

@@ -366,6 +366,16 @@ class ListViewSpec extends Specification {
         RegexMatchValue.NAME | '.*'
     }
 
+    def 'recurse folders'() {
+        when:
+        view.recurse(true)
+
+        then:
+        Node root = view.node
+        root.recurse[0].text() == 'true'
+
+    }
+
     protected String getDefaultXml() {
         '''<?xml version='1.0' encoding='UTF-8'?>
 <hudson.model.ListView>