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>

8157957: ClassNotFoundException: jdk.test.lib.JDKToolFinder
Reviewed-by: coleenp, gtriantafill, mseledtsov, iignatyev, dholmes, dsamersoff

8160088: update hotspot tests depending on GC to use @requires vm.gc.X
Reviewed-by: iignatyev, mchernov, dholmes

8153737: Unsupported Module
Reviewed-by: alanb, mchung, psandoz

8134995: [REDO] GC: implement ranges (optionally constraints) for those flags that have them missing
Summary: Add ranges and constraint functions for GC flags.
Reviewed-by: kbarrett, jmasa, jwilhelm, gziemski, zmajo

8134972: [BACKOUT] GC: implement ranges (optionally constraints) for those flags that have them missing
Reviewed-by: jwilhelm

8078555: GC: implement ranges (optionally constraints) for those flags that have them missing
Summary: Add ranges and constraint functions for GC flags.
Reviewed-by: jmasa, kbarrett, gziemski, ddmitriev, drwhite