8165153: Crash in rebuild_cpu_to_node_map Summary: use processor_count(), not active_processor_count() to determine physical number of CPUs Reviewed-by: rehn, cjplummer

Merge

8165246: [REDO] InstanceKlass::_previous_version_count goes negative Summary: make _has_previous_version a boolean that is set to true when previous version of a class is added or during class unloading call to purge_previous_versions Reviewed-by: gtriantafill, dcubed, sspitsyn