md-button-toggle-group & md-radio-group: Doesn't work well together

[abidev]

Bug: md-button-toggle-group & md-radio-group doesn't work as expected if present in the same component

Current Behaviour:
If we select a button in button toggle group then selecting radio group automatically unselects the button group and vice versa. It's only occurring for first button toggle group and first radio group in a component.

Please Check the Below Link to reproduce the issue.
Plunker: https://plnkr.co/edit/Ff1oQuPg7nlPPYVvXg98?p=preview

Versions:

• Angular Material 2.0.0-beta.1 rebar-teacup

Note: Correct me if something wrong in the above approach

[crisbeto]

This was fixed in #2343. You can work around it by setting a name explicitly.

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