[SCB-260] Add third party notices

[yangbor]

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[coveralls]

Coverage remained the same at 95.285% when pulling a32fcb9 on yangbor:master into 5412022 on apache:master.

[WillemJiang]

It's better to use the notices director instead of licenses.

[yangbor]

From my POV it's irrelevent where we put the NOTICE-xxx files so long as the end user can get those files. And put them under the licenses folder have the advantage that the end user can get all the legal information from one place.