[Table] Padding attribute getting added to native element

[JoshuaLicense]

• This is a v1.x issue.
• I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior

It shouldn't get applied to the native element, and just set under the getChildContext(), and then extracted to not be included in the ...other.

Current Behavior

The prop padding is getting spread to the <table> native element.

<table ... padding="dense">
...
</table>

Steps to Reproduce

Can be reproduced in the docs, all the Table examples have padding="..." attribute applied on the native <table> element.

Your Environment

Tech	Version
Material-UI	v1.5.0