Update StreamManager to perform event type filtering server side instead of client side.
Update StreamManager to perform event type filtering server side instead
of client side.

StackStorm/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,StackStorm/st2,Plexxi/st2,nzlosh/st2,nzlosh/st2,Plexxi/st2,StackStorm/st2,nzlosh/st2,StackStorm/st2