We are using the "autobind" feature of Linux to get a special
socket address. This allows us to have roughly 2^20 clients on
the system.
Change-Id: Ie9b9ac6267f40345baf7dbb3becaecf264a5df5f
This is an interim solution but is bringing all parts together.
We will need to:
* Abstract this into a base class
* Be able to mix different tests without interfering with each
other (e.g. 10k LU tests, 2k SMS sending)
* The event loop will need to handle multiple timers/timeouts
* Stats printing should print more information and test pass/fail
* The test should quit early if everything has already passed
Change-Id: Id3277ed0f0f9ee734569bedd4752564eb68c9cfd