Minor change to Helidon version handling allowing snapshot versions (… #1

Job	Run time
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AllOf)	1m 35s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOf)	2m 16s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOfNoCompare)	2m 33s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/FormModels)	2m 18s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/OneOf)	2m 0s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/Petstore)	1m 41s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/UseDateTimeForDate)	2m 13s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AllOf)	1m 16s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOf)	2m 43s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOfNoCompare)	2m 2s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/FormModels)	1m 5s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/OneOf)	3m 6s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/Petstore)	2m 31s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/UseDateTimeForDate)	1m 0s
	28m 19s

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