BUGFIX: Correctly handle realtime indexing of user workspaces

Indexing jobs created through realtime indexing of changes to a user
workspace caused an exception, since no workspace was set in the
context.

This change will use the node's workspace in those cases.

Fixes #11

Author: kdambekalns

Classes/Flowpack/ElasticSearch/ContentRepositoryQueueIndexer/IndexingJob.php

@@ -95,7 +95,7 @@ public function execute(QueueInterface $queue, Message $message)
                 /** @var NodeData $nodeData */
                 $nodeData = $this->nodeDataRepository->findByIdentifier($node['nodeIdentifier']);
                 $context = $this->contextFactory->create([
-                    'workspaceName' => $this->targetWorkspaceName,
+                    'workspaceName' => $this->targetWorkspaceName ?: $nodeData->getWorkspace()->getName(),
                     'invisibleContentShown' => true,
                     'inaccessibleContentShown' => false,
                     'dimensions' => $node['dimensions']