When x tick count set, only show 2 ticks for categories

When categories array is large, trying to show just show 10 of them by setting tick_count = 10, but only two ticks shows.
Here are the jsfiddle: [https://jsfiddle.net/Dekai/ysdaha7o/6/](https://jsfiddle.net/Dekai/ysdaha7o/6/)

Sample code Snippet:
var dataCategories = ["01 Jan 2016", "02 Jan 2016", "03 Jan 2016", "04 Jan 2016", "05 Jan 2016", "06 Jan 2016", "07 Jan 2016", "08 Jan 2016", "09 Jan 2016", "10 Jan 2016", "11 Jan 2016", "12 Jan 2016", "13 Jan 2016", "14 Jan 2016", "15 Jan 2016", "16 Jan 2016", "17 Jan 2016", "18 Jan 2016", "19 Jan 2016", "20 Jan 2016", "21 Jan 2016", "22 Jan 2016", "23 Jan 2016", "24 Jan 2016", "25 Jan 2016", "26 Jan 2016", "27 Jan 2016", "28 Jan 2016", "29 Jan 2016", "30 Jan 2016", "31 Jan 2016", "01 Feb 2016", "02 Feb 2016", "03 Feb 2016", "04 Feb 2016", "05 Feb 2016", "06 Feb 2016", "07 Feb 2016", "08 Feb 2016", "09 Feb 2016", "10 Feb 2016", "11 Feb 2016", "12 Feb 2016", "13 Feb 2016", "14 Feb 2016", "15 Feb 2016", "31 Mar 2016"];

```
axis: {
x: {
type: 'category',
categories: dataCategories,
tick: {
count: 11
}
}
}
```

Reproduce the behavior using the linked JSFiddle and the axis.x category configuration with tick.count set to 11. Trace the category x-axis tick-count handling and verify that the requested number of category ticks is rendered for the sample data.

Written by the indexing model from the issue text.