time scale label should in local time when timestamp (in UTC) input, tick should align with day.
        
        
            time scale label should in UTC time when option.useUTC is `true`, tick should not align with day.
            tooltip (default) should be OK.
        
        
        
            time scale label should in UTC time when option.useUTC is `true`, tick should not align with day.
            tooltip (formatter: series0 2017-02-09 16:00) should be OK.
        
        
        useUTC: null, should display '00:00 01-03' in tooltip on the 1st point
        
        useUTC: true, should display '16:00 01-02' in tooltip on the 1st point