Some edge cases won't be fixed until next SolrMarc upgrade (need List support)

* VuFindSearch/Backend/Solr/HandlerMap.php (setHandlerMap): Set D/I/A
  if handler definition does not contain functions.

Extra safety check for RSS detection.

* VuFindSearch/Backend/Solr/Backend.php (search): Use dedicated
  variable for E_STRICT compliance.

* VuFind/Search/Factory/AbstractSolrBackendFactory.php
  (createListeners): Create and attach SOLR v4 error listener.

* VuFind/Search/Solr/AbstractErrorListener.php (attach): New
  method. Attach to shared event manager.

* VuFind/Search/Solr/V3/ErrorListener.php: Extend
  AbstractErrorListener.
* VuFind/Search/Solr/V4/ErrorListener.php: Extend
  AbstractErrorListener.
* VuFind/Search/Solr/AbstractErrorListener.php: New
  class. Abstract base class of error listeners.

* VuFind/Search/Solr/V4/ErrorListener.php
  (getResponseBodyMediaType): New function. Return normalized
  response body media type identifier.
  (analyzeJsonErrorResponse): New function. Analyze response body
  and return appropriate tags.
  (onSearchError): Refactored. Use new functions.

Thanks to Ere Maijala and Chris Hallberg.

Thanks to Michele Meloni.

Thanks to Michele Meloni.

* VuFindSearch/Backend/Summon/Backend.php (search, retrieve):
  Catch Summon Exception and rethrow as BackendException.

Resolves VUFIND-749.

Same problem as before with title
Value not set for new record

MyResearch/EditList/NEW?recordId=xxxxx&recordSource=VuFind
Caused an error because title is not set in list object