Expose advertise_ip and advertise_port as command line options in mesos slave

advertise_ip and advertise_port are exposed as mesos master command line args (MESOS-809). But the following use case makes it a candidate for adding as command line args in mesos slave as well.

On Tue, Oct 27, 2015 at 7:43 PM, Xiaodong Zhang <xdzhang@alauda.io> wrote:
It works! Thanks a lot.

发件人: haosdent <haosdent@gmail.com>
答复: "user@mesos.apache.org" <user@mesos.apache.org>
日期: 2015年10月28日 星期三 上午10:23
至: user <user@mesos.apache.org>
主题: Re: How to tell master which ip to connect.

Do you try `export LIBPROCESS_ADVERTISE_IP=xxx` and `LIBPROCESS_ADVERTISE_PORT` when start slave?

On Wed, Oct 28, 2015 at 10:16 AM, Xiaodong Zhang <xdzhang@alauda.io> wrote:
Hi teams:

My scenarios is like this:

My master nodes were deployed in AWS. My slaves were in AZURE.So they communicate via public ip.
I got trouble when slaves try to register to master.
Now slaves can get master’s public ip address,and can send register request.But they can only send there private ip to master.(Because they don’t know there public ip,thus they can’t not bind a public ip via —ip flag), thus masters can’t connect slaves.How can the slave to tell master which ip master should connect(I can’t find any flags like —advertise_ip in master).