If the login phase takes multiple login requests we should keep the ITT the same for all login requets and not increment it.
A multi-phase login is only a single task eventhough it may be spread across multiple login requetst.
While most targets are forgiving and still work if we increment the ITT for each login command, some targets such as SOLARIS/COMSTAR is NOT forgiving if we break the protocol in this situation.
Fix the ITT handling so that we dont make SOLARIS/COMSTAR upset.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>