Adding of configuring for TxSending buffer for non-netty version #18
Description
We need to add into "ManagementImpl" setters txBufferSize and rxBufferSize (default values are as now 8192 bytes).
These values will then be used by non-netty versions of AssociationImpl
private ByteBuffer rxBuffer = ByteBuffer.allocateDirect(8192);
private ByteBuffer txBuffer = ByteBuffer.allocateDirect(8192);