session: start tracking active path for session
session: start tracking active path for session

Start tracking the active path that corresponds to the session.

Change-Id: I3ca309b7dda89aa40719815cb0f9ee50fabd3d10
Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>

openbmc/phosphor-ipmi-flash