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

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

8087315: SIGBUS error in nsk/jvmti/RedefineClasses/StressRedefine
Summary: Need to get source_file_name from the_class's constant pool not previous version constant pool
Reviewed-by: dcubed, sspitsyn