Fixing redis cachekey

src/Core/Lock/ILockDriver.php

@@ -36,14 +36,14 @@ interface ILockDriver
 	 * @param string $key      The Name of the lock
 	 * @param bool   $override Overrides the lock to get released
 	 *
-	 * @return void
+	 * @return boolean Was the unlock successful?
 	 */
 	public function releaseLock($key, $override = false);
 
 	/**
 	 * Releases all lock that were set by us
 	 *
-	 * @return void
+	 * @return boolean Was the unlock of all locks successful?
 	 */
 	public function releaseAll();
 }