- Remove constructor in favor of explicit dependency injection from
  ChaincodeSupport to the handler instance.
- Add some documentation comments and group fields in Handler
- Change state to int based enum so zero value matches default state of
  created
- Rename getCCRootName to chaincodeName to more accurately reflect what
  is returned

Change-Id: I56aa4245be5d1f465b50842b1e92b9b53eff0303
Signed-off-by: Saad Karim <skarim@us.ibm.com>
Signed-off-by: Matthew Sykes <sykesmat@us.ibm.com>