RFR 8014956: nashorn/api/javaaccess/MethodAccessTest.java test fails on sparc-solari,s 64

[Coleen Phillmore]

Summary: reference_map[] array had uninitialized junk that was causing a 
bogus bootstrap method to be found.

open webrev at http://cr.openjdk.java.net/~coleenp/8014956/
bug link at http://bugs.sun.com/view_bug.do?bug_id=8014956

Tested with nashorn api tests and test in bug (and vm.quick.testlist in 
progress).

Thanks,
Coleen