[Inline notification] notification kind icon lacks hover over text customization

Environment

Operating system

MacOS 10.14.6 (18G103)

Browser

Chrome Version 77.0.3865.120 (Official Build) (64-bit)

Automated testing tool and ruleset

Manual testing

Assistive technology used to verify

Manual testing

Detailed description

What version of the Carbon Design System are you using?

"carbon-components": "9.x"
"carbon-components-react": "6.x"

What did you expect to happen?

When setting the hover over text on the close button like so <InlineNotification kind='error' iconDescription='Close' ...>, I was not expecting the error icon to also get <title> of Close.

What happened instead?

<InlineNotification> should have the ability to to specify text for the error/success/warning icon

What WCAG 2.1 checkpoint does the issue violate?

Not sure.

Steps to reproduce the issue

1. Use mouse pointer to hover over the error/warning/success icon. See three pictures below for example. Note: Warning completely lacks a title

http://v6-react.carbondesignsystem.com/?selectedKind=Notifications&selectedStory=inline&full=0&addons=1&stories=1&panelRight=0&addonPanel=storybooks%2Fstorybook-addon-knobs

Note: This problem is also on the latest carbon react http://react.carbondesignsystem.com/?path=/story/notifications--inline

[joshblack]

cc @dakahn labelling this as v9 and moving out of v10 milestone

[asudoh]

Thank you for explaining the problem. A PR is welcome to introduce another prop for assistive text for the status icon.