vsctl: fix timeout
vsctl: fix timeout

- run_command's timeout argument is named 'timeout_msec', but
  all callers seem to pass the value in second.  so rename
  the argument to 'timeout_sec'.

- gevent.Timeout takes a timeout value in second.
  remove a conversion, which seems wrong even if the argument was in ms.

Signed-off-by: YAMAMOTO Takashi <458bba2e4a8704776b33478100c98529b639cd9e@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

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