Upgrading to react v15.3.2 causes multiple unknown props warnings

[sarahheredia]

When upgrading to support react v15.3.2 the components need to be updated not to pass custom attributes down to DOM elements.

[adampickeral]

more info on the proper way to strip custom props out of passed in props that are being spread to DOM elements

https://facebook.github.io/react/warnings/unknown-prop.html