Make sure that the module are installed too.

Original commit: elastic/x-pack-elasticsearch@f581d0902c

qa/security-example-extension/build.gradle

@@ -62,6 +62,11 @@ integTestCluster {
   setting 'xpack.security.authc.realms.native.order', '2'
   setting 'xpack.ml.enabled', 'false'
 
+  // This is important, so that all the modules are available too.
+  // There are index templates that use token filters that are in analysis-module and
+  // processors are being used that are in ingest-common module.
+  distribution = 'zip'
+
   setupCommand 'setupDummyUser',
                'bin/x-pack/users', 'useradd', 'test_user', '-p', 'changeme', '-r', 'superuser'
   setupCommand 'installExtension',