When using the Solr Bundle, I would expect the index to be updated when content is trashed. Currently trashing content with the Solr Bundle leads to an error in the admin itself .

Steps to reproduce:

1. Install demo version of eZ Platform
2. Enable Solr Bundle and Index
3. Navigate to a section
4. Count number of child elements
5. Send one child element to trash
6. See that the child count remains unchanged and there is an error: "An error occurred while loading the sub-items list"
7. Refresh the search index on the command line
8. Reload page and it loads correctly (one item less, no error)