XWIKI-19270: Add support for performing the PDF export using a browser running...

XWIKI-19270: Add support for performing the PDF export using a browser running in a Docker container
* Make the test content pages non-hidden (for now we print to PDF all child pages but in the future we may want to filter out hidden pages).

xwiki-platform-core/xwiki-platform-export/xwiki-platform-export-pdf/xwiki-platform-export-pdf-test/xwiki-platform-export-pdf-test-content/pom.xml

@@ -52,4 +52,27 @@
       <artifactId>jquery</artifactId>
     </dependency>
   </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.xwiki.commons</groupId>
+        <artifactId>xwiki-commons-tool-xar-plugin</artifactId>
+        <configuration>
+          <contentPages>
+            <contentPage>.*/PDFExportIT/.*\.xml</contentPage>
+          </contentPages>
+          <entries>
+            <entry>
+              <document>PDFExportIT.Parent.WebHome</document>
+              <type>demo</type>
+            </entry>
+            <entry>
+              <document>PDFExportIT.Parent.Child.WebHome</document>
+              <type>demo</type>
+            </entry>
+          </entries>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 </project>

xwiki-platform-core/xwiki-platform-export/xwiki-platform-export-pdf/xwiki-platform-export-pdf-test/xwiki-platform-export-pdf-test-content/src/main/resources/PDFExportIT/Parent/Child/WebHome.xml

@@ -24,7 +24,7 @@
   <web>PDFExportIT.Parent.Child</web>
   <name>WebHome</name>
   <language/>
-  <defaultLanguage/>
+  <defaultLanguage>en</defaultLanguage>
   <translation>0</translation>
   <creator>xwiki:XWiki.Admin</creator>
   <parent>PDFExportIT.Parent.WebHome</parent>
@@ -35,7 +35,7 @@
   <comment/>
   <minorEdit>false</minorEdit>
   <syntaxId>xwiki/2.1</syntaxId>
-  <hidden>true</hidden>
+  <hidden>false</hidden>
   <content>== Section 1 ==
 
 Content of first section.

xwiki-platform-core/xwiki-platform-export/xwiki-platform-export-pdf/xwiki-platform-export-pdf-test/xwiki-platform-export-pdf-test-content/src/main/resources/PDFExportIT/Parent/WebHome.xml

@@ -24,7 +24,7 @@
   <web>PDFExportIT.Parent</web>
   <name>WebHome</name>
   <language/>
-  <defaultLanguage/>
+  <defaultLanguage>en</defaultLanguage>
   <translation>0</translation>
   <creator>xwiki:XWiki.Admin</creator>
   <parent>PDFExportIT.WebHome</parent>
@@ -35,7 +35,7 @@
   <comment/>
   <minorEdit>false</minorEdit>
   <syntaxId>xwiki/2.1</syntaxId>
-  <hidden>true</hidden>
+  <hidden>false</hidden>
   <content>= Chapter 1 =
 
 Content of first chapter. Current user is {{velocity}}$xcontext.userReference{{/velocity}}.