Fixes InvalidSessionID when restarting ifmap

This patch fixes an issue when the ifmap server
is restarted. In that case the svc_monitor gets
InvalidSessionID error from the newly ifmap connection
and starts to flood the ifmap server.

Closes-bug #1375696

Change-Id: Ibec3f7e1fe253c3a0e81ed812f028b302b986f3c
Merge "Fixes InvalidSessionID when restarting ifmap"