@Parameterized.Parameters
  public static Collection coordinatedByZK() {
    return Arrays.asList(false, true);
  }
Checks if the SCP of specific dead server has been executed.
@return true if the SCP of specific serverName has been executed, false if not
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRollingRestart.java