Add travis-ci configuration file

Contributed-by: Zifei Tong <soariez@gmail.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
Tests: remove useless sleep when spawning sessiond

The new daemonize scheme returns to the parent only when the session
daemon is ready to operate thus the sleep that was used to wait for the
session deamon to bootstrap is no longer needed.

Signed-off-by: David Goulet <dgoulet@efficios.com>
Tests: fix racy UST snapshot post mortem test

Fixes #666

Signed-off-by: David Goulet <dgoulet@efficios.com>