Increase websocket binary size

Buffer increase was necessary to avoid the following error:
"WARN:oejw.WebSocketConnectionRFC6455:Frame discarded. Binary aggregation disabed for SCEP@fdbc27{l(/0:0:0:0:0:0:0:1:51199)<->r(/0:0:0:0:0:0:0:1:8081),d=true,open=true,ishut=false,oshut=false,rb=false,wb=false,w=true,i=1r}-{WebSocketServletConnectionRFC6455 p=WebSocketParserRFC6455@1264bf5 state=DATA buffer= g=WebSocketGeneratorRFC6455@144d0c6 closed=false buffer=-1}"