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

8158412: [TESTBUG] TestIHOPErgo and TestStressG1Humongous should not be executed when JFR is enabled
Reviewed-by: dfazunen, tschatzl

8157452: [TESTBUG] PLAB tests don't handle unexpected GC
Reviewed-by: dfazunen, tschatzl

8154258: [TESTBUG] Various serviceability tests fail compilation
Summary: Replace sun.misc.Unsafe with jdk.internal.misc.Unsafe
Reviewed-by: chegar, kvn

8149662: Refactor hotspot/test/gc/g1/plab/lib/LogParser.java
Reviewed-by: tschatzl, dfazunen

8150648: Re-enable TestPLABResize.java after JDK-8150183 is fixed
Reviewed-by: tschatzl

8150183: gc/g1/plab/TestPLABResize.java - previous PLAB size should be less than current
Reviewed-by: jmasa, dfazunen

8151196: Several tests fail due to test library not found
Reviewed-by: ctornqvi, brutisso

Merge

8141141: Young and Old gen PLAB stats are similar in output with -XX:+PrintPLAB
Summary: Improve PLAB statistic by adding generation, output values are now in bytes, including units, and split it into multiple messages.
Reviewed-by: brutisso, sjohanss

8150647: Quarantine TestPLABResize.java until JDK-8150183 is fixed
8150562: Quarantine LoadAgentDcmdTest.java due to JDK-8150318
Reviewed-by: iklam, tschatzl

8148745: [testbug] Test gc/g1/plab/TestPLABPromotion.java fails in nightly
Reviewed-by: tschatzl, dfazunen

8141278: New tests for PLAB testing
Reviewed-by: tschatzl