Summary: modified some tests to use COMPILEJAVA instead of TESTJAVA for javac and include path
Reviewed-by: dholmes, mseledtsov

4505697: nsk/jdi/ExceptionEvent/_itself_/exevent006 and exevent008 tests fail with InvocationTargetException
Reviewed-by: dcubed, dholmes, sspitsyn

Reviewed-by: dholmes, sla

8034867: Object references from expression stack are not visible as roots via jvmti FollowReferences and HeapDump
Summary: The heap walking is inconsistent without following references from expression stack, so need to fix it
Reviewed-by: coleenp, sspitsyn
Contributed-by: axel.siebenborn@sap.com

Reviewed-by: kvn, sla, coleenp, sspitsyn