Fixed intermittent test failures with "bind error"

[merlimat]

Motivation

There are several tests that occasionally are failing with bind error. Eg. from LoadBalancerTest:

io.netty.channel.unix.Errors$NativeIoException: bind(..) failed: Address already in use
	at io.netty.channel.unix.Errors.newIOException(Errors.java:122)
	at io.netty.channel.unix.Socket.bind(Socket.java:287)
	at io.netty.channel.epoll.AbstractEpollChannel.doBind(AbstractEpollChannel.java:687)
	at io.netty.channel.epoll.EpollServerSocketChannel.doBind(EpollServerSocketChannel.java:70)
	at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:558)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1338)
	at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:501)
	at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:486)
	at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:999)
	at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:254)
	at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:366)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)

Modifications

• Make sure the bookies in the ensemble will get each a port from PortManager so that the port is locked and not reused.

[merlimat]

run integration tests

[merlimat]

run integration tests

[sijie]

run integration tests

[ivankelly]

@merlimat

int bookiePort = 0;

OS will automatically assign a free port.