v7.15.0 release (#21792) #226

Job	Run time
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOf)	1m 52s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/FormModels)	1m 12s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/FormModels)	1m 16s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/Petstore)	1m 5s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AllOf)	1m 13s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOfNoCompare)	1m 10s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/OneOf)	1m 3s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOf)	1m 28s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/Petstore)	1m 7s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOfNoCompare)	1m 25s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AllOf)	1m 8s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/UseDateTimeForDate)	1m 14s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/UseDateTimeForDate)	1m 23s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/OneOf)	1m 7s
	17m 43s

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