At present Olingo2 component only supports configuring Http Asynchronous Client. Asynchronous client lagging behind in feature wrt features (but steadily catching up). Using Synchronous client makes debugging issues easier. Also, this will make things easier for those using ThreadLocals.
The proposed change provides an option to the user to choose between Synchronous and Asynchronous client while keeping the Asynchronous client as default and keeping the existing functionality intact.