the reason for the failure is that io thread passes through a sequence of state
changes before it eventually got stuck at the expect running state as NO.
It's unreasonble to wait for the running status while the whole idea of the test is
to get to the IO thread error.

Fixed with changing the waiting condition.

mysql-test/suite/rpl/r/rpl_server_id1.result:
  results changed
mysql-test/suite/rpl/t/disabled.def:
  re-enabling rpl_server_id1
mysql-test/suite/rpl/t/rpl_server_id1.test:
  deploying the exact waiting condition i.e to wait for the slave io error.