[Bug Fix] simple/msg: Initialize domain_attr and ep_attr

Initialize domain_attr and ep_attr before passing it to fi_getinfo. Fixed some whitespace issues.

Signed-off-by: Arun C Ilango <arun.ilango@intel.com>
simple: Add an example to illustrate fi_poll usage.

Signed-off-by: Arun C Ilango <arun.ilango@intel.com>
Merge pull request #95 from a-ilango/dev

Some fixes and example for fi_poll