Fix authorization property issue

The change fixes a XML generating error (KeyError: '_use_folder_perms')
for project, which isn't contained in a folder and has got authorization
properties.

Task: 38110
Story: 2007087

Change-Id: I2e0ec6e524d07a935333b35e10eb4204af9256f7

jenkins_jobs/modules/properties.py

@@ -510,7 +510,7 @@ def authorization(registry, xml_parent, data):
     """
 
     # get the folder name if it exists
-    in_a_folder = data.pop("_use_folder_perms")
+    in_a_folder = data.pop("_use_folder_perms", None) if data else None
 
     credentials = "com.cloudbees.plugins.credentials.CredentialsProvider."
     ownership = "com.synopsys.arc.jenkins.plugins.ownership.OwnershipPlugin."

tests/yamlparser/fixtures/project-with-auth-properties.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<com.cloudbees.hudson.plugins.folder.Folder plugin="cloudbees-folder">
+  <icon class="com.cloudbees.hudson.plugins.folder.icons.StockFolderIcon"/>
+  <views/>
+  <viewsTabBar class="hudson.views.DefaultViewsTabBar"/>
+  <primaryView>All</primaryView>
+  <healthMetrics/>
+  <actions/>
+  <description>&lt;!-- Managed by Jenkins Job Builder --&gt;</description>
+  <keepDependencies>false</keepDependencies>
+  <blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>
+  <blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>
+  <concurrentBuild>false</concurrentBuild>
+  <canRoam>true</canRoam>
+  <properties>
+    <hudson.security.AuthorizationMatrixProperty>
+      <permission>hudson.model.Item.Build:auser</permission>
+    </hudson.security.AuthorizationMatrixProperty>
+  </properties>
+  <scm class="hudson.scm.NullSCM"/>
+  <publishers/>
+  <buildWrappers/>
+</com.cloudbees.hudson.plugins.folder.Folder>

tests/yamlparser/fixtures/project-with-auth-properties.yaml

@@ -0,0 +1,12 @@
+- property:
+    name: auth-prop-test
+    properties:
+    - authorization:
+        auser:
+          - job-build
+
+- job:
+    name: auth-job-test
+    project-type: folder
+    properties:
+    - auth-prop-test