8165687: Fix license and copyright headers in jd9 under hotspot/test
Summary: Legal notices and Oracle copyrights were updated (white and blank space, commas) in tests files for uniformity to meet Oracle requirements.
Reviewed-by: dholmes, iris
Contributed-by: Stanislav Smirnov <stanislav.smirnov@oracle.com>, Vassili Igouchkine <vassili.igouchkine@oracle.com>

8132710: Add tests which check that Humongous objects behave as expected after Young GC
8132712: Add tests which check that Humongous objects behave as expected after Full GC
Reviewed-by: jmasa, dfazunen