RFR: 8033440: jmap reports unexpected used/free size of concurrent mark-sweep generation

[Stefan Johansson]

Hi,

Please review this change to fix:
https://bugs.openjdk.java.net/browse/JDK-8033440

Webrev:
http://cr.openjdk.java.net/~sjohanss/8033440/webrev.00/

Summary:
The compactibleFreeListSpace has been updated to use an AdaptiveFreeList 
instead of a FreeList. This change has not been done for the SA and it 
leads to using a too small element size when walking through the list. 
When fixing this I realized that FreeList<FreeChunk> and some other type 
declarations associated with it weren't used by the SA, so I went ahead 
and removed them. I (or Eclipse) also changed the Java *-imports to be 
specific ones.

Testing:
* JPRT for build and sanity.
* UTE run for tests listed in bug.
* Aurora run for tmtools.testlist.

Thanks,
Stefan