Reflect clustered layer's name in new layer's name

[MohamedNourArm]

Addresses issue #462

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Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[MohamedNourArm]

@googlebot I signed it!

[MohamedNourArm]

@googlebot I signed it!

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