RFR (XS): 8238189 Cleanups to AES crypto micros

[eric.caspole at oracle.com]

Hi everyone,
Get I get reviews on this small change to the AESBench crypto micro, 
which puts all the algorithms into the small set for convenience of 
testing compiler intrinsics etc.

JBS:
https://bugs.openjdk.java.net/browse/JDK-8238189

Webrev:
http://cr.openjdk.java.net/~ecaspole/JDK-8238189/01/webrev/

Thanks,
Eric