[9] RFR 8132947: Add tier2, tier2 and tier1_2 testsets to jprt.properties

[Alejandro E Murillo]

Please review the webrev below for this enhancement:
8132947: Add tier2, tier2 and tier1_2 testsets to jprt.properties

webrev: http://cr.openjdk.java.net/~amurillo/9/8132947/
bug: https://bugs.openjdk.java.net/browse/JDK-8132947

Thanks

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Alejandro