session table may be shared among multiple appns's.
app ns add id blue secret 1 if tap0
app ns add id red secret 1 if tap0
session table holds the last added app_ns's appns_index.
If the last app_ns is deleted, session table is not free
since there is still an appns which uses the same session
table. In that case, session table is holding the free
app_ns's appns_index and it can cause problem.
The fix is to modify appns_index in session table to hold
a vector of appns_index's instead of just the appns_index
that was last added. When the app ns is deleted, remove the
deleted appns_index from the session table's vector of
appns_index's.
Type: fix
Change-Id: Ied8bc97f185071dc89b9b56656e18efbd2995131
Signed-off-by: Steven Luong <sluong@cisco.com>