Reviewed-by: sla

Summary: Added new tests to cover missing CDS basic funtions
Reviewed-by: coleenp, ctornqvi

Reviewed-by: dcubed, dholmes

Summary: Rewrote the test in pure Java, added RedefineClassHelper utility class
Reviewed-by: coleenp, allwin, gtriantafill, dsamersoff

Summary: The build of Hotspot should not remove the symlinks for libjsig.
Reviewed-by: dcubed, dholmes

Reviewed-by: sla, allwin