Summary: Reduce the amount of calls to ChunkManager verification code
Reviewed-by: jmasa, coleenp

Summary: support of compress class pointers in the compilers.
Reviewed-by: kvn, twisti

Reviewed-by: coleenp, stefank, jprovino, ohair

Reviewed-by: johnc, ysr

Reviewed-by: jcoomes, brutisso

Reviewed-by: coleenp, jcoomes

Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: Njmasa &lt;jon.masamitsu@oracle.com&gt;, stefank &lt;stefan.karlsson@oracle.com&gt;, mgerdin &lt;mikael.gerdin@oracle.com&gt;, never <tom.rodriguez@oracle.com>