netipmid: make session a header-only situation

The Session class is a fairly simple class, no need for an external cpp
file; make it all header-only and allow the compiler to do its job.

Change-Id: Ibbe7e963762926ec04c75ab187a5b8045de851f4
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
3 files changed