Avoid losing entry when fetching fail

Instead of just say “Failed to save entry” we’ll save the entry at all cost and try to fetch content. If fetching content failed, the entry will still be saved at least, but without content.

src/Wallabag/ImportBundle/Import/AbstractImport.php

@@ -79,20 +79,20 @@ abstract class AbstractImport implements ImportInterface
 
     /**
      * Fetch content from the ContentProxy (using graby).
-     * If it fails return false instead of the updated entry.
+     * If it fails return the given entry to be saved in all case (to avoid user to loose the content).
      *
      * @param Entry  $entry   Entry to update
      * @param string $url     Url to grab content for
      * @param array  $content An array with AT LEAST keys title, html, url, language & content_type to skip the fetchContent from the url
      *
-     * @return Entry|false
+     * @return Entry
      */
     protected function fetchContent(Entry $entry, $url, array $content = [])
     {
         try {
             return $this->contentProxy->updateEntry($entry, $url, $content);
         } catch (\Exception $e) {
-            return false;
+            return $entry;
         }
     }