sanlock: paxos delays
    
    Change two delays in the paxos code:
    - sleep 1 instead of 2 between host_id liveness changes;
      I was using 1 during the most successful test run, but
      should go back and see if there's actually any difference
      between using 1 and 2.
    - sleep random time between 0 and 1 sec between ballot retries;
      this should hopefully resolve the situation I saw where all
      hosts were in fast ballot retry loops, always seeing larger
      mbal values from other hosts (even if it would have resolved
      itself eventually, it's not nice to hammer the system in a
      loop like this for so long if we can avoid it.)
    
    Also more comment, and log message changes.