Fixed init subscriptions on starting STAN server
Fixed init subscriptions on starting STAN server

Added a connection flush in initSubscriptions to ensure subscriptions
are processed before RunServer() returns. This should reduce the chance
of getting Connect() timeout errors on Travis.

petemiron/nats-streaming-server,nats-io/nats-streaming-server,petemiron/nats-streaming-server,nats-io/nats-streaming-server,petemiron/nats-streaming-server