Currently, vdev_id and session_id are assumed to be the same, but are
generated in two separate code paths. Unsurprisingly, this leads to a
whole host of desync issues. Instead, modify sme_open_session to take
a session_id, which will be populated with an objmgr vdev_id. This means
vdev_id and session_id can no longer desync, as there is only a single
source for both.
Change-Id: I104aba29beb3c19d0ef2ff23380e3d005e01ced0
CRs-Fixed: 2022136
d28772bde9