When iscsid restarted for an existing active session, set DDB will
fail with status already logged in. In this case, we have to send
logged in event to iscsid.

JIRA Key: OPENISCSI-21
Signed-off-by: NManish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: NVikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>