8067662: "java.lang.NullPointerException: Method name is null" from StackTraceElement.<init>
Summary: update java/lang/instrument/RedefineMethodInBacktrace.sh test to cover the hotspot fix
Reviewed-by: coleenp, dcubed

8006506: Add test for redefining methods in backtraces to java/lang/instrument tests
Reviewed-by: sspitsyn, coleenp