Test for Composite (Hub & HubPort)

Change-Id: Ieb652d9c3f64c38335a2f9f25a4051f3e1584eda
More assertions for RtpEndpoint and WebRtcEndpoint tests

Change-Id: Ibeae514a91559e71fa4bb43b2cf4e669b5684056
Configurable timeout factor

Change-Id: I3eb7535f7d9772b08fbded5c8687ade76f8b86f6