RFR: 8211057: Gensrc step CompileProperties generates unstable CompilerProperties output

[Liam Miller-Cushon]

Hi,

Please review this fix to ClassGenerator, which ensures it produces
deterministic output.
Previously the order of FactoryKinds in the output relied on HashMap
iteration order.

bug: https://bugs.openjdk.java.net/browse/JDK-8211057
webrev: http://cr.openjdk.java.net/~cushon/8211057/webrev.00/index.html
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