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

8161990: Un-quarantine TestParallelHeapSizeFlags.java and TestSmallHeap.java.
Reviewed-by: tschatzl

8161660: Quarantine TestParallelHeapSizeFlags.java and TestSmallHeap.java
Summary: Quarantine test.
Reviewed-by: dholmes, thartmann

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

8078673: Update TEST.groups for recent GC tests
Summary: Updates the needs_g1gc list in TEST.groups and adds appropriate "@requires vm.gc" annotations to a few GC tests.
Reviewed-by: tschatzl, dfazunen

8140189: [TESTBUG] Get rid of "@library /../../test/lib" in jtreg tests
Summary: Use new external.lib.roots property in TEST.ROOT so /../../test/lib is not needed.
Reviewed-by: mseledtsov, sla, iklam

8075586: Add @modules as needed to the open hotspot tests
Reviewed-by: sla, ctornqvi, lfoltan, mchung, alanb
Contributed-by: alexander.kulyakhtin@oracle.com

8066433: Move Whitebox test library to top level repository
Summary: Moved Whitebox test library to top level repository.
Reviewed-by: iignatyev, sla, mr

8049864: TestParallelHeapSizeFlags fails with unexpected heap size
Reviewed-by: sjohanss, jmasa

8057918: Update out-dated ignore tags in GC jtreg tests
Reviewed-by: ehelin, tschatzl

8011397: JTREG needs to copy additional WhiteBox class file to JTwork/scratch/sun/hotspot
Reviewed-by: kvn, iignatyev, mgerdin
Contributed-by: andrey.x.zakharov@oracle.com

8048895: Back out JDK-8027915
Reviewed-by: mgerdin, stefank

8027915: TestParallelHeapSizeFlags fails with unexpected heap size on sparcv9
Reviewed-by: jmasa, sjohanss

8044132: Quarantine unstable/broken GC tests
Reviewed-by: ehelin, jwilhelm

8014489: tests/gc/arguments/Test(Serial|CMS|Parallel|G1)HeapSizeFlags jtreg tests invoke wrong class
Summary: Some jtreg tests reference unknown classes in the @run and @build lines. This change fixes them.
Reviewed-by: stefank, ehelin

8014058: Regression tests for 8006088
Summary: The patch for 8006088 misses regression tests after a merge error, this CR provides them.
Reviewed-by: jwilhelm, tamao, jmasa