if reconnect is disabled then a failure in iscsi_service_reconnect_if_loggedin
can leak back to the application by iscsi_service returning an error
but the error string is not being updated.
Thus the applucation will print the last prevous error message that was set.
Change iscsi_service_reconnect_if_loggedin to print a less confusing
error message.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>