add method to get bucket name from s3 storage

Signed-off-by: Robin Appelman <robin@icewind.nl>

lib/private/Files/ObjectStore/S3ConnectionTrait.php

@@ -65,14 +65,17 @@ protected function parseParams($params) {
 		$this->params = $params;
 	}
 
+	public function getBucket() {
+		return $this->bucket;
+	}
 
 	/**
 	 * Returns the connection
 	 *
 	 * @return S3Client connected client
 	 * @throws \Exception if connection could not be made
 	 */
-	protected function getConnection() {
+	public function getConnection() {
 		if (!is_null($this->connection)) {
 			return $this->connection;
 		}