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
* Force the 1.0 version of the WebSocket API because we're still supporting Jetty 9.4.x and cdt-java-client seems to be compatible with 1.0 version even if it depends on 1.1

(cherry picked from commit 19367770)

xwiki-platform-core/xwiki-platform-export/xwiki-platform-export-pdf/xwiki-platform-export-pdf-default/pom.xml

@@ -74,6 +74,20 @@
       <groupId>com.github.kklisura.cdt</groupId>
       <artifactId>cdt-java-client</artifactId>
       <version>4.0.0</version>
+      <exclusions>
+        <!-- Chrome Developer Tools Java client depends on WebSocket API 1.1 which we can't use yet because we support
+          an older version of Jetty (9.4.x). Fortunately, it seems that the code is compatible with the WebSocket API
+          1.0 version that comes from our parent POM so we can force it for now. -->
+        <exclusion>
+          <groupId>javax.websocket</groupId>
+          <artifactId>javax.websocket-api</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <!-- Replaces the 1.1 version coming as transitive dependency of cdt-java-client, see above. -->
+    <dependency>
+      <groupId>javax.websocket</groupId>
+      <artifactId>javax.websocket-api</artifactId>
     </dependency>
     <!-- Test dependencies -->
     <dependency>