RFR: 8217332: JTREG: Clean up, use generics instead of raw types

[Thomas Schatzl]

Hi,

On Fri, 2019-01-18 at 10:11 +0100, Leo Korinth wrote:
> Hi,
> 
> This webrev fixes lack of generics usage in the jtreg/gc folder.
> 
> This fix is somewhat based/dependent on "8214799: Add package 
> declaration to each JTREG test case in the gc folder". That fix is
> out 
> for review.
> 
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8217332
> 
> Webrev:
> http://cr.openjdk.java.net/~lkorinth/8217332/00
> 
> Testing:
> passed locally: open/test/hotspot/jtreg/:hotspot_gc
> 

  I assume this is, as some other reviews in this series, to remove
some warnings in some code analysis tool. Fine with me to fix such
problems in our jtreg code: so ship it.

Thanks,
  Thomas