Update RackspaceAdapter->has() to catch OpenCloud ObjectNotFoundExceptions, to return a proper has value.

Author: Hunter Skrasek

src/Adapter/Rackspace.php

@@ -5,6 +5,7 @@
 use League\Flysystem\Util;
 use OpenCloud\ObjectStore\Resource\Container;
 use OpenCloud\ObjectStore\Resource\DataObject;
+use OpenCloud\ObjectStore\Exception\ObjectNotFoundException;
 use Guzzle\Http\Exception\ClientErrorResponseException;
 
 class Rackspace extends AbstractAdapter
@@ -163,6 +164,8 @@ public function has($path)
             $object = $this->getObject($path);
         } catch(ClientErrorResponseException $e) {
             return false;
+        } catch(ObjectNotFoundException $e) {
+            return false;
         }
 
         return $this->normalizeObject($object);