Rule th-has-data-cells does not return expected result

[jeeyyy]

Expectation: The example below should fail.

<table>
	<tr>
		<th id="col1">Column 1</th>
		<th id="Column2">Column 2</th>
	</tr>
	<tr>
		<td></td>
		<td headers="col1"></td>
	</tr>
</table>

Actual:
Does not fail.

Motivation:

axe-core version: X.Y.Z
axe-webdriver, extension or other integration version: X.Y.Z

Browser and Assistive Technology versions

For Tooling issues:
- Node version: XX  
- Platform:  

[straker]

The check only looks at if the row/column has a cell that is not a header but fails to look if the cell points at a different header than the current row/column

[padmavemulapati]

Verified with the latest axe-core, as per the fix, it was motivated to fail for the table headers, but it never fails. We are seeing now it is into incomplete instead pass

[jeeyyy]

No docs change. Closing issue.