RFR: 8131343: Remove unused imports from hotspot/test/testlibrary/jdk/test/lib/*.java

[Michail Chernov]

Hi,

Could you please review this small patch to 
hotspot/test/testlibrary/jdk/test/lib/*.java which removes unused import 
and fixes spelling.

http://cr.openjdk.java.net/~mchernov/8131343/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8131343

Thanks,
Michail