There is a single hidden field in the chaincode_support.go
ChaincodeSupport struct.  This is the system chaincode provider.
Although there is no obvious need for un-hiding this field, it is
inconsistent and distracting when looking at the code.

Change-Id: I23fd44a32479c434ad04ff93c003656a3a5c83fd
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>