Fix timeouts in expect conversation with su
TIMEOUT at /account/chpw Timeout exceeded. <pexpect.pty_spawn.spawn object at 0x7ffaa0a3e2b0> command: /bin/su
TIMEOUT at /account/chpw Timeout exceeded. <pexpect.pty_spawn.spawn object at 0x7ffaa0a3e2b0> command: /bin/su