Please review 7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table

[Coleen Phillimore]

Summary: Cannot delete _buckets and HashtableEntries in shared space (CDS)

Tested with the tests that I added using Class Data Sharing (on and 
off).  This is both a patch for 7u6 and main.

open webrev at http://cr.openjdk.java.net/~coleenp/hashmap_cds/
open webrev at http://cr.openjdk.java.net/~coleenp/hashmap_7u6_cds/

Thanks,
Coleen